What is the official website of DHL ?

The official website of DHL is http://www.dhl.com.

What is DHL's cybersecurity risk score?

DHL has an AI-generated cybersecurity risk score of 794 out of 1000, indicating a Fair security posture according to Rankiteo's assessment.

How many security incidents has DHL experienced?

According to Rankiteo, DHL currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.

Has DHL been affected by any supply chain cyber incidents ?

According to Rankiteo, DHL has been affected by a supply chain cyber incident involving Fortinet, with the incident ID SAMFOXORAFORDHL1781785487.

Does DHL have SOC 2 Type 1 certification ?

According to Rankiteo, DHL is not certified under SOC 2 Type 1.

Does DHL have SOC 2 Type 2 certification ?

According to Rankiteo, DHL does not hold a SOC 2 Type 2 certification.

Does DHL comply with GDPR ?

According to Rankiteo, DHL is not listed as GDPR compliant.

Does DHL have PCI DSS certification ?

According to Rankiteo, DHL does not currently maintain PCI DSS compliance.

Does DHL comply with HIPAA ?

According to Rankiteo, DHL is not compliant with HIPAA regulations.

Does DHL have ISO 27001 certification ?

According to Rankiteo,DHL is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.

Which industry does DHL operate in ?

DHL operates primarily in the Transportation, Logistics, Supply Chain and Storage industry.

How many employees does DHL have ?

DHL employs approximately 224,682 people worldwide.

Does DHL own any subsidiaries ?

DHL presently has no subsidiaries across any sectors.

How many LinkedIn followers does DHL have ?

DHL's official LinkedIn profile has approximately 2,770,958 followers.

What is the NAICS classification code for DHL ?

DHL is classified under the NAICS code 47, which corresponds to Transportation and Warehousing.

Does DHL have a Crunchbase profile ?

No, DHL does not have a profile on Crunchbase.

Does DHL have a LinkedIn profile ?

Yes, DHL maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/dhl.

How many cybersecurity incidents has DHL experienced ?

As of August 2, 2026, Rankiteo reports that DHL has experienced 2 cybersecurity incidents.

How many peer or competitor companies does DHL have ?

DHL has an estimated 6,695 peer or competitor companies worldwide.

What types of cybersecurity incidents has DHL faced ?

Incident Types: The types of cybersecurity incidents that have occurred include Breach and Cyber Attack.

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DHL

Boost Score +25 with badge (5 left)

794

/1000

Fair

819

/1000

Good

DHL Vendor Cyber Rating & Cyber Score

dhl.com

Add Your Compliance Badge

DHL is the leading global brand in the logistics industry. Our divisions offer an unrivaled portfolio of logistics services ranging from national and international parcel delivery, e-commerce shipping and fulfillment solutions, international express, road, air and ocean transport to industrial supply chain management. With specialized solutions for growth markets and industries including technology, life sciences and healthcare, engineering, manufacturing & energy, auto-mobility and retail, DHL is decisively positioned as "The logistics company for the world". DHL is part of DHL Group. Privacy notice https://group.dhl.com/en/data-protection.html

DHL A.I CyberSecurity Scoring

Scoring History

DHL

DHL CyberSecurity News & History

Past Incidents

Attack Types

Entity

Type

Severity

Impact

Seen

Blog Details

Supply Chain Source

Incident Details

View

DHL

Cyber Attack

4/2026

DHL1777415025

DHL

Breach

100

5/2025

Fortinet

SAMFOXORAFORDHL...

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A.I.

DHL Company Scoring based on AI Models

Cyber Incidents Likelihood 3 - 6 - 9 months

Actual

Prediction

Incident Predictions locked

Access Monitoring Plan

A.I Risk Score Likelihood 3 - 6 - 9 months

Actual

Prediction A

Prediction B

Prediction C

Prediction D

A.I. Risk Score Predictions locked

Access Monitoring Plan

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Underwriter Stats for DHL

Incidents vs Transportation, Logistics, Supply Chain and Storage Industry Avg (This Year)

DHL has 31.97% fewer incidents than the average of same-industry companies with at least one recorded incident.

Incidents vs All-Companies Average (This Year)

DHL has 2.91% fewer incidents than the average of all companies with at least one recorded incident.

Incident Types DHL vs Transportation, Logistics, Supply Chain and Storage Industry Avg (This Year)

DHL reported 1 incidents this year: 1 cyber attacks, 0 ransomware, 0 vulnerabilities, 0 data breaches, compared to industry peers with at least 1 incident.

Incident History - DHL (X = Date, Y = Severity)

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SUBSIDIARY

DHL Subsidiaries

DHL

Transportation, Logistics, Supply Chain and Storage

Website: http://www.dhl.com

Company Size: 10,000+ employees

DHL Group Investor RelationsTransportation, Logistics, Supply Chain and Storage

DHL Supply ChainTransportation, Logistics, Supply Chain and Storage

DHL Global ForwardingTransportation, Logistics, Supply Chain and Storage

DHL FreightTransportation, Logistics, Supply Chain and Storage

DHL SverigeTransportation, Logistics, Supply Chain and Storage

DHL FoodLogisticsTransportation, Logistics, Supply Chain and Storage

DHL Freight Enterprise Software SolutionsIT Services and IT Consulting

DHL Global Event LogisticsTransportation, Logistics, Supply Chain and Storage

Aero Cargas as agent of DHL Global ForwardingTransportation, Logistics, Supply Chain and Storage

Deutsche Post und DHLTransportation, Logistics, Supply Chain and Storage

DHL ConsultingBusiness Consulting and Services

DHL ExpressTransportation, Logistics, Supply Chain and Storage

DHL Express IndiaTransportation, Logistics, Supply Chain and Storage

DHL Express MéxicoTruck Transportation

DHL Express BrasilTruck Transportation

DHL Express TürkiyeTransportation, Logistics, Supply Chain and Storage

DHL Asia Pacific Shared Services Sdn BhdTransportation, Logistics, Supply Chain and Storage

DHL Express IrelandTransportation, Logistics, Supply Chain and Storage

DHL Express QatarTransportation, Logistics, Supply Chain and Storage

DHL Express VietnamTruck Transportation

DHL Express JordanTransportation, Logistics, Supply Chain and Storage

DHL Aviation (UK) LimitedTransportation, Logistics, Supply Chain and Storage

DHL Sri LankaTransportation, Logistics, Supply Chain and Storage

DHL Express RomaniaTransportation, Logistics, Supply Chain and Storage

DHL Express Middle East and North AfricaTransportation, Logistics, Supply Chain and Storage

DHL Express TaiwanTransportation, Logistics, Supply Chain and Storage

DHL Express BulgariaTransportation, Logistics, Supply Chain and Storage

DHL Express AustriaTransportation, Logistics, Supply Chain and Storage

DHL Airways GmbHTransportation, Logistics, Supply Chain and Storage

DHL Express SwitzerlandTransportation, Logistics, Supply Chain and Storage

DHL Express JapanTransportation, Logistics, Supply Chain and Storage

DHL Express LebanonTransportation, Logistics, Supply Chain and Storage

DHL Express GreeceTransportation, Logistics, Supply Chain and Storage

DHL Express OmanTransportation, Logistics, Supply Chain and Storage

DHL Express HungaryTransportation, Logistics, Supply Chain and Storage

DHL Express LatviaTransportation, Logistics, Supply Chain and Storage

DHL AfricaTransportation, Logistics, Supply Chain and Storage

DHL Express NorwayTransportation, Logistics, Supply Chain and Storage

DHL Express LithuaniaTransportation, Logistics, Supply Chain and Storage

DHL Express - IsraelTransportation, Logistics, Supply Chain and Storage

DHL Express SerbiaFreight and Package Transportation

DHL Express CroatiaTransportation, Logistics, Supply Chain and Storage

DHL Express Estonia ASTransportation, Logistics, Supply Chain and Storage

DHL Express EspañaTransportation, Logistics, Supply Chain and Storage

DHL Express SlovakiaTransportation, Logistics, Supply Chain and Storage

DHL Express SloveniaTransportation, Logistics, Supply Chain and Storage

DHL Express ItalyFreight and Package Transportation

DHL Express FranceTransportation, Logistics, Supply Chain and Storage

DHL Express UKTransportation, Logistics, Supply Chain and Storage

European Air Transport Leipzig GmbHAirlines and Aviation

DHL Express EgyptTransportation, Logistics, Supply Chain and Storage

DHL Express UAETransportation, Logistics, Supply Chain and Storage

DHL Express PakistanTransportation, Logistics, Supply Chain and Storage

DHL Express BelgiumFreight and Package Transportation

DHL Air (Austria) GmbHAirlines and Aviation

DHL Express MalaysiaTruck Transportation

DHL Air (UK) LtdAirlines and Aviation

DHL Express SingaporeTransportation, Logistics, Supply Chain and Storage

DHL Express NederlandFreight and Package Transportation

DHL Express MarocFreight and Package Transportation

DHL eCommerceTruck Transportation

DHL eCommerce NederlandFreight and Package Transportation

DHL eCommerce EspañaTransportation, Logistics, Supply Chain and Storage

DHL eCommerce UKTransportation, Logistics, Supply Chain and Storage

DHL Cross-Border Solutions Austria & Eastern EuropeFreight and Package Transportation

DHL eCommerce Polska (DHL Parcel)Transportation, Logistics, Supply Chain and Storage

DHL eCommerce BelgiumFreight and Package Transportation

DHL Life Sciences & HealthcareTransportation, Logistics, Supply Chain and Storage

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DHL Similar Companies

Kuehne+Nagel

cb kuehne-nagel.com

With more than 82,000 employees at almost 1,300 sites in close to 100 countries, the Kuehne+Nagel Group is one of the world's leading logistics providers. Headquartered in Switzerland, Kuehne+Nagel is listed in the Swiss blue-chip stock market index, the SMI. The Group is the global number one in air and sea logistics and has strong market positions in road and contract logistics. Kuehne+Nagel is the logistics partner of choice for 400,000 customers worldwide. Using its global network, logistics expertise and data-based insights, the Group provides end-to-end supply chain solutions for global companies and industries.

CMA CGM

cma-cgm.com

The CMA CGM Group is a global player in sea, land, air and logistics solutions, true to its corporate Purpose, "We imagine better ways to serve a world in motion". Present in 177 countries, it employs 160,000 people, of which nearly 6,000 in Marseilles where its head office is located. The world's 3rd largest shipping company, CMA CGM serves more than 420 ports across 5 continents with a fleet of over 650 vessels. In 2024, CMA CGM carried over 23 million TEU (twenty-foot equivalent unit) containers. Its subsidiary CEVA Logistics, one of the world's top five players, operates 1,000 warehouses and handled 15 million shipments in 2024. CMA CGM AIR CARGO, the Group's air freight division, will operate a fleet of 6 cargo aircraft by 2025. CMA Media, France's 3rd largest private media group, includes RMC-BFM and several national and regional press titles (La Tribune Dimanche, La Tribune, La Provence and Corse Matin). Committed to energy transition, the CMA CGM Group is aiming for Net Zero Carbon by 2050. The CMA CGM Foundation provides humanitarian aid in crisis situations, and is committed to education for all and equal opportunities throughout the world. To date, the CMA CGM Foundation has transported 63,000 tons of humanitarian aid to 97 countries and supported over 550 educational projects.

Aramex

aramex.com

Founded in 1982, Aramex has emerged as a global leader in logistics and transportation, renowned for its innovative services tailored to businesses and consumers. As a listed company on the Dubai Financial Market (since 2005) and headquartered in the UAE, our strategic location facilitates extensive customer reach worldwide, bridging the gap between East and West. With operations in 600+ cities across 70 countries, Aramex employs over 16,000 professionals. Our success is attributed to four distinct business products that provide scalable, diversified, and end-to- end services for customers. These products are: • International Express, encompassing Aramex's Parcel Forwarding Business (Shop & Ship and MyUS). • Domestic Express • Freight Forwarding • Logistics & Supply Chain Solutions Sustainability is at the core of our vision and mission. To build a truly sustainable business, we leverage our core competencies to make a positive impact as responsible members of the communities we serve. Through partnerships with local and international organizations, we strive to expand our reach and benefit more individuals through targeted programs and initiatives, ensuring long-term positive change and community development. For more information, please visit us: www.aramex.com

Delhivery

delhivery.com

Delhivery is India’s largest fully-integrated logistics services provider. With a nationwide network spanning over 18,850 pin codes, the company offers a comprehensive range of logistics solutions — including express parcel transportation, partial-truckload (PTL) and full-truckload (FTL) freight, cross-border services, supply chain solutions, Delhivery Direct (national and local courier services) and technology-enabled logistics. Comprehensive Solutions for Every Need ➡️Express Parcel: Send shipments across India, including heavy goods, with value-added services like real-time tracking, NDR Management, WhatsApp based updates, RTO, Protect ➡️Delivery Direct: All-in-one courier service that lets you send anything within the city or anywhere in India ➡️Rapid: A sub-2-hour delivery service helping brands offer faster deliveries and a better customer experience ➡️Supply Chain Solutions: Store and manage inventory at optimized locations across India, fulfilling orders for both B2B and B2C channels with precision. ➡️Partial Truckload (PTL):Leverage India’s large PTL network for door-to-door or hub-to-hub delivery with multimodal freight and smart dashboards. ➡️Full Truckload (FTL): Handle high-volume shipments with speed and efficiency through our professional network of truckload partners and our own fleet. ➡️Cross-Border Services: Ship parcels and freight to 220+ countries with door-to-door and port-to-port logistics ➡️TransportOne: Delhivery’s AI‑powered TMS that gives enterprises end‑to‑end optimization, from intelligent sourcing and load stacking to agentic ePOD and automated billing Our Impact at Scale ✔️4 Billion+ parcels shipped since inception ✔️Coverage of 99.5% of India’s population ✔️Trusted by 48,000+ businesses ✔️Shipped over 4.7 Million tonnes of freight ✔️Managing 22.05 Million+ sqft of logistics infrastructure Start shipping: https://one.delhivery.com/register Download Delhivery Direct App: https://appdelhivery.go.link/5YuVn

Yusen Logistics

yusen-logistics.com

Yusen Logistics is the insight-driven, customer-centric logistics partner to global business. We deliver this through an extended range of services from International Freight Forwarding and Contract Logistics to Supply Chain Solutions and Industry insights covering the full supply chain. We invest in a deep understanding of our customers' business, their customers, the challenges they face and the goals they want to achieve. Yusen Logistics has a global network linking Japan, the Americas, Europe, East Asia and South Asia & Oceania, and operates more than 650 distribution centers/offices in 46 countries and over 25.000 employees. Designing and implementing award winning solutions to complex supply chain requirements, Yusen Logistics’ skilled teams, state-of-the-art equipment and sophisticated technology deliver cost effective results with added value. Yusen Logistics delivers high performance solutions from raw materials to finished products throughout the supply chain. Working with manufacturers and retailers Yusen Logistics offers specialist expertise in: • Automotive • Aerospace • Consumer Electronics & Technology • Healthcare & Pharmaceuticals • Retail • Food Logistics Yusen Logistics works closely with customers to create enhanced solutions with the design, planning, and execution of key services including: • Global Freight Forwarding • Transportation Management • Warehousing and Distribution • End to end Supply Chains With regional headquarters in Europe, Japan, East Asia, Oceania and the Americas, Yusen Logistics’ international network covers almost every country in the world. Building on its established infrastructure Yusen Logistics is rolling out networks in emerging markets to mirror clients’ changing sourcing patterns. INSIGHT INTO ACTION. YUSEN LOGISTICS

Toll Group

tollgroup.com

At Toll, we do more than just logistics - we move the businesses that move the world. Our 16,000 team members can help solve any logistics, transport, or supply chain challenge – big or small. We have been supporting our customers for more than 130 years. Today, we support more than 20,000 customers worldwide with 500 sites in 29 markets, and a forwarding network spanning 150 countries. We are proudly part of Japan Post — www.tollgroup.com What moves you? At Toll, you can help play a vital role in delivering what matters. From food, fuel, medicine and rescue services, we keep businesses and communities thriving. Every day brings change. We see that as an opportunity. To be curious. To ask the right questions. And build meaningful connections. Because finding new ways to solve problems is what we do. With a bold vision to expand our global reach, our 16,000+ people bring a passion for progress. We collaborate in friendly, caring teams, supported by approachable leaders who give us the autonomy to quickly make decisions with impact. Learn and grow with industry-leading training, alongside talented experts. Feel empowered to take on diverse challenges and new responsibilities to move you, our customers, and our world further.

Expeditors

expeditors.com

Expeditors is a Fortune 500 service-based logistics company with headquarters in Seattle, Washington, USA. At Expeditors, we generate highly optimized and customized supply chain solutions for our clients with unified technology systems integrated through a global network of over 350 locations in 100+ countries on six continents. Expeditors is focused on the increasingly sophisticated needs of international trade through customized solutions and seamless, integrated information systems. Our services include air and ocean freight consolidation and forwarding, vendor consolidation, customs clearance, cargo insurance, distribution and other value-added logistics services. We pride ourselves on being a solutions-based organization that takes the time to understand each customer's individual business needs. As a non-asset based organization, we have considerable flexibility when managing customers' supply chains. Our relationships with local suppliers and global air and ocean partners provides our customers with the best routing and pricing options. Expeditors' comprehensive, flexible spectrum of services is supported by leading-edge information technology providing the highest level of end to end visibility. To maintain consistent quality and customer service across the globe, Expeditors has regional headquarters located in London, Dubai, Shanghai and Singapore. At Expeditors, our industry professionals, award winning processes and globally unified systems ensure that we always live up to our promise, "You'd be surprised how far we'll go for you."

Walmart Distribution Center

walmart.com

Saving people money so they can live better is a big job. That’s why we have one of the largest private distribution networks in the world. Each of our 42 regional U.S. distribution centers is over 1 million square feet, with more than 12 miles of conveyor belts to move 5.5 billion cases of merchandise. Some distribution centers operate 24/7 around the clock to keep the Walmart fleet rolling. It’s all designed to pass on savings to our customers and communities. Working here, you’ll be part of an unrivaled operation that’s leading the way for innovation, efficiency and safety. By joining one of the largest private fleets and distribution networks in the world, you’ll gain the training, teamwork and technology you need to move your career – and 5.5 billion cases of merchandise each year.

Blue Dart

bluedart.com

Blue Dart Express Ltd., South Asia's premier express air, integrated transportation & distribution company, offers secure and reliable delivery of consignments to over 56,000+ locations in India. Blue Dart is a provider of choice for its stakeholders due to its customer centric approach and aims to further strengthen this partnership. As part of DHL Group’s DHL eCommerce division, Blue Dart accesses the largest and most comprehensive express and logistics network worldwide, covering over 220 countries and territories, and offers an entire spectrum of distribution services including air express, freight forwarding, supply chain solutions, customs clearance etc. The Blue Dart team drives market leadership through its motivated people, dedicated air and ground capacity, cutting-edge technology, wide range of innovative, vertical specific products and value-added services to deliver unmatched standards of service quality to its customers. Blue Dart's market leadership is further validated by its position as the nation’s most innovative and awarded express logistics company for exhibiting reliability, superior brand experience and sustainability which include recognition as one of ‘India's Best Companies to Work For’ by The Great Place to Work® Institute, India, ranked amongst ‘Best Multinational Workplaces in Asia’ by The Great Place to Work® Institute, Asia, voted a ‘Superbrand’ and ‘Reader’s Digest Most Trusted Brand’, listed as one of Fortune 500’s ‘India's Largest Corporations’ and Forbes ‘India's Super 50 Companies’ to name a few. Blue Dart’s Diversity and Inclusion initiatives have also led to it being recognized as one of India’s ‘Best Workplaces for Women’ in 2021 and ‘Best Organizations for Women’ in 2022 by the Economic Times. Blue Dart fulfils its social responsibility of climate protection (GoGreen), disaster management (GoHelp) and education (GoTeach) through its GoPrograms.

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NEWS

DHL CyberSecurity News

Latest updates, reports, and threat intel affecting the global network.

January 14, 2026 08:00 AM

Comment Kuehne + Nagel – cyber risk heightens, yet under control

It was before Christmas when, according to market talk, Kuehne + Nagel (K+N) had to deal with a cyber attack that carried the risk of...

Read Article

November 19, 2025 08:00 AM

Safe Online Holiday Shopping

Stay safe online with these tips for doing your holiday shopping online safely – a complete guide for 2025!

Read Article

November 12, 2025 08:00 AM

New Phishing Attack Leverages Popular Brands to Harvest Login Credentials

A sophisticated phishing campaign has emerged, targeting organizations across Central and Eastern Europe by impersonating legitimate global...

Read Article

November 11, 2025 08:00 AM

DHL Supply Chain Releases Insight 2030 Supply Chain Leaders Survey - DHL - United States of America

While 99% of executives view the supply chain as critical to business success, 73% expect their supply chains to be more reliant on AI,...

Read Article

October 14, 2025 07:00 AM

Comment Ransomware claim against DSV – spotlight on Coinbase Cartel threat

For uninterrupted access, sign-in, subscribe or upgrade to The Loadstar Premium.* For as little as £23 / month (£220/year), we can get you...

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October 14, 2025 07:00 AM

News DSV targeted by new logistics-focused hacking group

A new hacking group is targeting logistics companies, with several already named as victims, including DSV and Kuehne + Nagel.

Read Article

September 20, 2025 07:00 AM

New Botnet Exploits Simple DNS Flaws That Leads to Massive Cyber Attack

Cybersecurity researchers at have uncovered a sophisticated Russian botnet operation that leveraged DNS misconfigurations.

Read Article

September 03, 2025 07:00 AM

DHL Express elevates Karen Tan to Asia Pacific CIO

DHL Express has elevated Karen Tan as chief information officer (CIO) for Asia Pacific (excluding China), effective September 1, 2025.

Read Article

September 03, 2025 07:00 AM

DHL Express appoints new CIO for Asia Pacific to drive digital acceleration and talent growth

DHL Express, the leading international express service provider, has appointed Karen Tan as chief information officer for the Asia-Pacific...

Read Article

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CVE

Latest

Global CVEs (Not Company-Specific)

CVE-2026-18556

SUMMARY

Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass. This issue affects N-central: through 2026.1.

Published

Date2026-08-01

Updated

Date2026-08-01

RISK INFORMATION (Score: )

cvss4

Base Score: 8.2

Complexity: HIGH

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

Exploitability

REFERENCES

https://uptime.n-able.com/

CVE-2026-55735

SUMMARY

Improper Verification of Cryptographic Signature in ueberauth guardian allows an unauthenticated attacker to revoke a victim's session with a forged token. Guardian.revoke/3 in lib/guardian.ex decodes the supplied token with peek/1, which performs no signature verification (it only base64-decodes the JWT header and payload). The resulting unverified claims are forwarded directly to the configured token module's revoke callback and the implementation's on_revoke callback, a state-mutating sink. The sibling operations refresh/2 and exchange/4 both call decode_and_verify first, so the signature is checked before anything acts on the claims; revoke/3 is the only state-mutating path that acts on claims without verifying the signature. An attacker who knows or guesses a victim's identifying claim values (jti, sub) can forge a JWT carrying those claims, sign it with an arbitrary key, and submit it to any endpoint that funnels a caller-supplied token into Guardian.revoke/3 (the standard logout / session-revocation pattern). When the token module mutates state keyed by the claims (whitelist deletion or blacklist insertion, for example a GuardianDb-style store), the victim's legitimate session is evicted. This is an unauthenticated session-revocation denial of service; the attacker never needs the signing secret. This issue affects guardian: from 1.0.0 before 2.4.1.

Published

Date2026-08-01

Updated

Date2026-08-01

RISK INFORMATION (Score: )

cvss4

Base Score: 8.2

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

Exploitability

REFERENCES

CVE-2026-55734

SUMMARY

Allocation of Resources Without Limits or Throttling vulnerability in ueberauth guardian (Guardian.Permissions module) allows a denial of service via BEAM atom-table exhaustion. This vulnerability is associated with program file lib/guardian/permissions.ex and program routines 'Elixir.Guardian.Permissions':encode_permissions!/1, 'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2, 'Elixir.Guardian.Permissions':do_encode_permissions!/2. The Guardian.Permissions mixin installs a public encode_permissions!/1 function on every module that does use Guardian.Permissions. For each key of the supplied map, encode_permissions!/1 calls String.to_atom(to_string(k)) before any validation runs. The integer-value clause of do_encode_permissions!/2 then short-circuits straight to encoding without validating the key against the configured permission set, so a key with an integer value is interned as a fresh atom with no exception raised. Atoms are never garbage collected and the BEAM atom table is a fixed-size resource (default roughly 1,048,576 entries), so each unique attacker-chosen key permanently consumes one slot. An attacker who can influence a permission map that reaches encode_permissions!/1 (for example a permissions map read from a request body and passed into token issuance via encode_permissions_into_claims!/2) can mint an unbounded number of atoms and exhaust the atom table, crashing the entire BEAM node and every service running on it. The sibling decode_permissions/1 is not affected because it skips keys absent from the configured permission set. This issue affects guardian: from 2.0.0 before 2.4.1.

Published

Date2026-08-01

Updated

Date2026-08-01

RISK INFORMATION (Score: )

cvss4

Base Score: 6.9

Complexity: LOW

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

Exploitability

REFERENCES

CVE-2026-55733

SUMMARY

Allocation of Resources Without Limits or Throttling in ueberauth guardian allows denial of service via unbounded atom creation from attacker-controlled binary input. Guardian.Permissions.AtomEncoding encodes permission scopes by passing arbitrary binaries to String.to_atom/1. When encode/3 in lib/guardian/permissions/atom_encoding.ex is called with a list, each binary entry is handled by the encode_value/3 binary clause, which calls String.to_atom(value) with no allow-list check. The perm_set argument (the application's small, finite set of legitimate permission names) is discarded, so any external string flows straight into atom creation. This encoder is selected with use Guardian.Permissions, encoding: Guardian.Permissions.AtomEncoding and reached through the imported encode/3 entry point. String.to_atom/1 creates a brand-new atom for every previously unseen binary, atoms are never garbage collected, and the BEAM atom table is fixed at roughly 1,048,576 entries by default. An application that funnels attacker-influenced permission scopes (from a request body, a JWT claim, or other external input) into encode/3 therefore mints one permanent atom per distinct value. A modest stream of varied, unauthenticated input permanently consumes the atom table and crashes the BEAM node with system_limit, taking down every application running on it. The default encoder is Guardian.Permissions.BitwiseEncoding, which is not affected. This issue affects guardian: from 2.0.0 before 2.4.1.

Published

Date2026-08-01

Updated

Date2026-08-01

RISK INFORMATION (Score: )

cvss4

Base Score: 6.9

Complexity: LOW

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Impact Score

Exploitability

REFERENCES

CVE-2026-54894

SUMMARY

Allocation of Resources Without Limits or Throttling in ueberauth guardian allows denial of service via unbounded atom creation from attacker-influenced binary input. Guardian.Plug.Keys derives connection and session namespace keys by passing arbitrary binaries to String.to_atom/1. base_key/1 in lib/guardian/plug/keys.ex converts any binary into the atom :"guardian_<input>", and the derived helpers claims_key/1, resource_key/1, and token_key/1 create a second atom on top of that. key_from_other/1 likewise converts a regex-captured binary through String.to_atom/1. The public specs advertise String.t() as a valid argument, so passing a string is documented usage, and higher-level entry points such as Guardian.Plug.current_token(conn, key: key) thread the caller-supplied key straight into these functions. String.to_atom/1 creates a brand-new atom for every previously unseen binary, atoms are never garbage collected, and the BEAM atom table is fixed at roughly 1,048,576 entries by default. An application that routes attacker-influenced data (a tenant identifier, header, or other request input) into a Guardian key therefore mints one permanent atom per distinct value. A modest stream of varied, unauthenticated input permanently consumes the atom table and crashes the BEAM node, taking down every application running on it. This issue affects guardian: from 0.1.0 before 2.4.1.

Published

Date2026-08-01

Updated

Date2026-08-01

RISK INFORMATION (Score: )

cvss4

Base Score: 6.9

Complexity: LOW

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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