Company Details
fastly
1,315
63,393
5112
fastly.com
0
FAS_1977047
In-progress


Fastly Company CyberSecurity Posture
fastly.comGet more powerful websites and applications with Fastly’s edge cloud platform. We help places like Reddit, Pinterest, Stripe, Neiman Marcus, The New York Times, Epic Games, and GitHub do so every day.
Company Details
fastly
1,315
63,393
5112
fastly.com
0
FAS_1977047
In-progress
Between 750 and 799

Fastly Global Score (TPRM)XXXX

Description: Fastly, a leading edge cloud computing and content delivery network (CDN) provider, was identified as one of the major vendors affected by CVE-2025-8671 (MadeYouReset), a critical HTTP/2 protocol-level vulnerability. The flaw allows threat actors to exploit server-sent stream resets, enabling devastating denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks. By manipulating HTTP/2 stream cancellation mechanisms, attackers force Fastly’s infrastructure to process an unbounded number of requests while bypassing concurrency limits, leading to severe CPU and memory exhaustion.The vulnerability stems from a mismatch between HTTP/2’s specification and real-world implementations, where reset streams are marked as inactive in protocol accounting but continue consuming backend resources. For Fastly, which powers high-traffic websites, APIs, and streaming services, this could result in catastrophic outages, disrupting global digital services, e-commerce platforms, and real-time applications reliant on its CDN. Prolonged exploitation might degrade performance for end-users, trigger financial losses for dependent businesses, and erode customer trust in Fastly’s reliability.While Fastly has likely released patches, unpatched systems remain at risk of large-scale disruptions, particularly if targeted by state-sponsored or criminal hacking groups seeking to weaponize the flaw against critical infrastructure. The vulnerability’s potential to halt or degrade internet-facing services positions it as a high-stakes threat to Fastly’s operational integrity and its clients’ digital continuity.


No incidents recorded for Fastly in 2026.
No incidents recorded for Fastly in 2026.
No incidents recorded for Fastly in 2026.
Fastly cyber incidents detection timeline including parent company and subsidiaries

Get more powerful websites and applications with Fastly’s edge cloud platform. We help places like Reddit, Pinterest, Stripe, Neiman Marcus, The New York Times, Epic Games, and GitHub do so every day.

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Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
The official website of Fastly is http://www.fastly.com.
According to Rankiteo, Fastly’s AI-generated cybersecurity score is 756, reflecting their Fair security posture.
According to Rankiteo, Fastly currently holds 0 security badges, indicating that no recognized compliance certifications are currently verified for the organization.
According to Rankiteo, Fastly has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.
According to Rankiteo, Fastly is not certified under SOC 2 Type 1.
According to Rankiteo, Fastly does not hold a SOC 2 Type 2 certification.
According to Rankiteo, Fastly is not listed as GDPR compliant.
According to Rankiteo, Fastly does not currently maintain PCI DSS compliance.
According to Rankiteo, Fastly is not compliant with HIPAA regulations.
According to Rankiteo,Fastly is not certified under ISO 27001, indicating the absence of a formally recognized information security management framework.
Fastly operates primarily in the Software Development industry.
Fastly employs approximately 1,315 people worldwide.
Fastly presently has no subsidiaries across any sectors.
Fastly’s official LinkedIn profile has approximately 63,393 followers.
Fastly is classified under the NAICS code 5112, which corresponds to Software Publishers.
No, Fastly does not have a profile on Crunchbase.
Yes, Fastly maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/fastly.
As of January 21, 2026, Rankiteo reports that Fastly has experienced 1 cybersecurity incidents.
Fastly has an estimated 28,125 peer or competitor companies worldwide.
Incident Types: The types of cybersecurity incidents that have occurred include Vulnerability.
Detection and Response: The company detects and responds to cybersecurity incidents through an third party assistance with cert/cc recommendations, and containment measures with rate-limiting rst_stream frames, containment measures with reviewing http/2 implementations, and remediation measures with vendor patches, remediation measures with protocol-level fixes, and communication strategy with public advisories, communication strategy with vendor notifications, and enhanced monitoring with monitoring for excessive stream resets..
Title: Critical HTTP/2 Vulnerability 'MadeYouReset' (CVE-2025-8671) Enables Potent DoS/DDoS Attacks
Description: A critical vulnerability (CVE-2025-8671, aka 'MadeYouReset') was discovered in numerous HTTP/2 implementations, enabling threat actors to orchestrate denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks. The flaw exploits a mismatch between the HTTP/2 specification and server implementations, abusing server-sent stream resets to create resource exhaustion. Attackers manipulate stream cancellation features to force servers into processing unbounded HTTP/2 requests, bypassing the SETTINGS_MAX_CONCURRENT_STREAMS safeguard. This leads to catastrophic CPU/memory overload. The vulnerability resembles CVE-2023-44487 ('Rapid Reset') and affects major vendors like Apache Tomcat, Mozilla, Red Hat, Netty, gRPC, Fastly, and others. Patches and mitigations (e.g., stricter RST_STREAM frame limits) are recommended.
Type: Denial-of-Service (DoS)
Attack Vector: NetworkProtocol Manipulation (HTTP/2 Stream Resets)
Vulnerability Exploited: CVE-2025-8671CVE-2025-48989 (Apache Tomcat)Name: MadeYouReset, Description: Exploits HTTP/2 stream reset accounting flaws to bypass concurrent stream limits, enabling resource exhaustion via unbounded request processing., Cvss Score: None, Severity: Critical.
Motivation: Disruption of ServicesExploitation of Unpatched SystemsLarge-Scale DDoS Potential
Common Attack Types: The most common types of attacks the company has faced is Vulnerability.

Systems Affected: HTTP/2 ServersBackend Infrastructure
Downtime: ['Potential Catastrophic Outages (CPU/Memory Exhaustion)']
Operational Impact: Service DegradationComplete System Failures
Brand Reputation Impact: Potential Loss of Trust in Affected Vendors

Entity Name: Apache Tomcat
Entity Type: Web Server, HTTP/2 Implementation
Industry: Technology

Entity Name: Mozilla
Entity Type: Browser Vendor, HTTP/2 Implementation
Industry: Technology

Entity Name: Red Hat
Entity Type: Enterprise Software, HTTP/2 Implementation
Industry: Technology

Entity Name: SUSE Linux
Entity Type: Operating System, HTTP/2 Implementation
Industry: Technology

Entity Name: Netty
Entity Type: Networking Framework, HTTP/2 Implementation
Industry: Technology

Entity Name: gRPC
Entity Type: RPC Framework, HTTP/2 Implementation
Industry: Technology

Entity Name: Fastly
Entity Type: CDN/Edge Computing, HTTP/2 Implementation
Industry: Technology

Entity Name: Varnish Software
Entity Type: Caching Solution, HTTP/2 Implementation
Industry: Technology

Entity Name: Eclipse Foundation
Entity Type: Open-Source Projects, HTTP/2 Implementation
Industry: Technology

Entity Name: AMPHP
Entity Type: PHP Async Framework, HTTP/2 Implementation
Industry: Technology

Third Party Assistance: Cert/Cc Recommendations.
Containment Measures: Rate-Limiting RST_STREAM FramesReviewing HTTP/2 Implementations
Remediation Measures: Vendor PatchesProtocol-Level Fixes
Communication Strategy: Public AdvisoriesVendor Notifications
Enhanced Monitoring: Monitoring for Excessive Stream Resets
Third-Party Assistance: The company involves third-party assistance in incident response through CERT/CC Recommendations, .
Prevention of Data Exfiltration: The company takes the following measures to prevent data exfiltration: Vendor Patches, Protocol-Level Fixes, .
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by rate-limiting rst_stream frames, reviewing http/2 implementations and .

Regulatory Notifications: CERT/CC Advisory

Lessons Learned: HTTP/2 implementations systematically fail to account for stream reset lifecycle management., Protocol-level vulnerabilities can have widespread impact across vendors., Rate-limiting and input validation are critical for mitigating DoS risks in modern protocols.

Recommendations: Apply vendor-provided patches immediately., Implement stricter limits on RST_STREAM frames and reset rates., Review HTTP/2 implementations for similar accounting flaws., Deploy additional rate-limiting controls until patches are applied., Monitor for unusual patterns in HTTP/2 stream resets.Apply vendor-provided patches immediately., Implement stricter limits on RST_STREAM frames and reset rates., Review HTTP/2 implementations for similar accounting flaws., Deploy additional rate-limiting controls until patches are applied., Monitor for unusual patterns in HTTP/2 stream resets.Apply vendor-provided patches immediately., Implement stricter limits on RST_STREAM frames and reset rates., Review HTTP/2 implementations for similar accounting flaws., Deploy additional rate-limiting controls until patches are applied., Monitor for unusual patterns in HTTP/2 stream resets.Apply vendor-provided patches immediately., Implement stricter limits on RST_STREAM frames and reset rates., Review HTTP/2 implementations for similar accounting flaws., Deploy additional rate-limiting controls until patches are applied., Monitor for unusual patterns in HTTP/2 stream resets.Apply vendor-provided patches immediately., Implement stricter limits on RST_STREAM frames and reset rates., Review HTTP/2 implementations for similar accounting flaws., Deploy additional rate-limiting controls until patches are applied., Monitor for unusual patterns in HTTP/2 stream resets.
Key Lessons Learned: The key lessons learned from past incidents are HTTP/2 implementations systematically fail to account for stream reset lifecycle management.,Protocol-level vulnerabilities can have widespread impact across vendors.,Rate-limiting and input validation are critical for mitigating DoS risks in modern protocols.

Source: Tel Aviv University Research Team (Gal Bar Nahum, Anat Bremler-Barr, Yaniv Harel)

Source: CERT/CC Vulnerability Note

Source: Vendor Advisories (Apache, Mozilla, Red Hat, etc.)
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Tel Aviv University Research Team (Gal Bar Nahum, Anat Bremler-Barr, Yaniv Harel), and Source: CERT/CC Vulnerability Note, and Source: Vendor Advisories (Apache, Mozilla, Red Hat, etc.).

Investigation Status: Ongoing (Patches Released; Mitigations Recommended)
Communication of Investigation Status: The company communicates the status of incident investigations to stakeholders through Public Advisories and Vendor Notifications.

Stakeholder Advisories: Vendor-Specific Patches, Cert/Cc Guidelines.
Customer Advisories: Urgent Patching RequiredMonitor for DDoS Indicators
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were Vendor-Specific Patches, Cert/Cc Guidelines, Urgent Patching Required, Monitor For Ddos Indicators and .

Root Causes: Protocol Specification Vs. Implementation Mismatch In Http/2 Stream Reset Handling., Inadequate Accounting For Backend Request Processing Post-Reset., Over-Reliance On Settings Max Concurrent Streams Without Enforcement.,
Corrective Actions: Patch Http/2 Implementations To Enforce Reset Limits., Re-Architect Stream Lifecycle Management To Align Protocol And Backend States., Enhance Testing For Protocol-Level Edge Cases.,
Post-Incident Analysis Process: The company's process for conducting post-incident analysis is described as Cert/Cc Recommendations, , Monitoring For Excessive Stream Resets, .
Corrective Actions Taken: The company has taken the following corrective actions based on post-incident analysis: Patch Http/2 Implementations To Enforce Reset Limits., Re-Architect Stream Lifecycle Management To Align Protocol And Backend States., Enhance Testing For Protocol-Level Edge Cases., .
Most Significant System Affected: The most significant system affected in an incident was HTTP/2 ServersBackend Infrastructure.
Third-Party Assistance in Most Recent Incident: The third-party assistance involved in the most recent incident was cert/cc recommendations, .
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident was Rate-Limiting RST_STREAM FramesReviewing HTTP/2 Implementations.
Most Significant Lesson Learned: The most significant lesson learned from past incidents was Rate-limiting and input validation are critical for mitigating DoS risks in modern protocols.
Most Significant Recommendation Implemented: The most significant recommendation implemented to improve cybersecurity was Apply vendor-provided patches immediately., Monitor for unusual patterns in HTTP/2 stream resets., Implement stricter limits on RST_STREAM frames and reset rates., Deploy additional rate-limiting controls until patches are applied. and Review HTTP/2 implementations for similar accounting flaws..
Most Recent Source: The most recent source of information about an incident are Vendor Advisories (Apache, Mozilla, Red Hat, etc.), Tel Aviv University Research Team (Gal Bar Nahum, Anat Bremler-Barr, Yaniv Harel) and CERT/CC Vulnerability Note.
Current Status of Most Recent Investigation: The current status of the most recent investigation is Ongoing (Patches Released; Mitigations Recommended).
Most Recent Stakeholder Advisory: The most recent stakeholder advisory issued was Vendor-Specific Patches, CERT/CC Guidelines, .
Most Recent Customer Advisory: The most recent customer advisory issued was an Urgent Patching RequiredMonitor for DDoS Indicators.
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SummaryA command injection vulnerability (CWE-78) has been found to exist in the `wrangler pages deploy` command. The issue occurs because the `--commit-hash` parameter is passed directly to a shell command without proper validation or sanitization, allowing an attacker with control of `--commit-hash` to execute arbitrary commands on the system running Wrangler. Root causeThe commitHash variable, derived from user input via the --commit-hash CLI argument, is interpolated directly into a shell command using template literals (e.g., execSync(`git show -s --format=%B ${commitHash}`)). Shell metacharacters are interpreted by the shell, enabling command execution. ImpactThis vulnerability is generally hard to exploit, as it requires --commit-hash to be attacker controlled. The vulnerability primarily affects CI/CD environments where `wrangler pages deploy` is used in automated pipelines and the --commit-hash parameter is populated from external, potentially untrusted sources. An attacker could exploit this to: * Run any shell command. * Exfiltrate environment variables. * Compromise the CI runner to install backdoors or modify build artifacts. Credits Disclosed responsibly by kny4hacker. Mitigation * Wrangler v4 users are requested to upgrade to Wrangler v4.59.1 or higher. * Wrangler v3 users are requested to upgrade to Wrangler v3.114.17 or higher. * Users on Wrangler v2 (EOL) should upgrade to a supported major version.
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle VM VirtualBox accessible data as well as unauthorized access to critical data or complete access to all Oracle VM VirtualBox accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).

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