What is the official website of Graham Holdings Company ?

The official website of Graham Holdings Company is http://www.ghco.com.

What is Graham Holdings Company's cybersecurity risk score?

Graham Holdings Company has an AI-generated cybersecurity risk score of 689 out of 1000, indicating a Weak security posture according to Rankiteo's assessment.

How many security incidents has Graham Holdings Company experienced?

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

Has Graham Holdings Company been affected by any supply chain cyber incidents ?

According to Rankiteo, Graham Holdings Company has not been affected by any supply chain cyber incidents, and no incident IDs are currently listed for the organization.

Does Graham Holdings Company have SOC 2 Type 1 certification ?

According to Rankiteo, Graham Holdings Company is not certified under SOC 2 Type 1.

Does Graham Holdings Company have SOC 2 Type 2 certification ?

According to Rankiteo, Graham Holdings Company does not hold a SOC 2 Type 2 certification.

Does Graham Holdings Company comply with GDPR ?

According to Rankiteo, Graham Holdings Company is not listed as GDPR compliant.

Does Graham Holdings Company have PCI DSS certification ?

According to Rankiteo, Graham Holdings Company does not currently maintain PCI DSS compliance.

Does Graham Holdings Company comply with HIPAA ?

According to Rankiteo, Graham Holdings Company is not compliant with HIPAA regulations.

Does Graham Holdings Company have ISO 27001 certification ?

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

Which industry does Graham Holdings Company operate in ?

Graham Holdings Company operates primarily in the Education Administration Programs industry.

How many employees does Graham Holdings Company have ?

Graham Holdings Company employs approximately 143 people worldwide.

Does Graham Holdings Company own any subsidiaries ?

Graham Holdings Company presently has no subsidiaries across any sectors.

How many LinkedIn followers does Graham Holdings Company have ?

Graham Holdings Company's official LinkedIn profile has approximately 2,710 followers.

What is the NAICS classification code for Graham Holdings Company ?

Graham Holdings Company is classified under the NAICS code 92311, which corresponds to Administration of Education Programs.

Does Graham Holdings Company have a Crunchbase profile ?

No, Graham Holdings Company does not have a profile on Crunchbase.

Does Graham Holdings Company have a LinkedIn profile ?

Yes, Graham Holdings Company maintains an official LinkedIn profile, which is actively utilized for branding and talent engagement, which can be accessed here: https://www.linkedin.com/company/graham-holdings-company.

How many cybersecurity incidents has Graham Holdings Company experienced ?

As of July 14, 2026, Rankiteo reports that Graham Holdings Company has experienced 1 cybersecurity incidents.

How many peer or competitor companies does Graham Holdings Company have ?

Graham Holdings Company has an estimated 15,025 peer or competitor companies worldwide.

What types of cybersecurity incidents has Graham Holdings Company faced ?

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

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GHC

Boost Score +25 with badge (5 left)

689

/1000

Weak

714

/1000

Moderate

Graham Holdings Company Vendor Cyber Rating & Cyber Score

ghco.com

Add Your Compliance Badge

Headquartered in Arlington, Va., Graham Holdings Company (NYSE:GHC) is a diversified holding company whose operations include: educational services, home health and hospice care, television broadcasting, online, print and local TV news, automotive dealerships, manufacturing, hospitality, consumer internet companies, digital marketing, and other emerging operations. Graham Holdings Company delivers quality products and services to today’s students, viewers, customers, patients, and advertisers. What unites our Company is a commitment to excellence across all of our business lines.

GHC A.I CyberSecurity Scoring

Scoring History

GHC

Graham Holdings Company CyberSecurity News & History

Past Incidents

Attack Types

Entity

Type

Severity

Impact

Seen

Blog Details

Supply Chain Source

Incident Details

View

Graham Holdings Com...

Breach

2/2026

KAPGRA177385891...

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A.I.

GHC 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 GHC

Incidents vs Education Administration Programs Industry Avg (This Year)

Graham Holdings Company has 44.75% fewer incidents than the average of same-industry companies with at least one recorded incident.

Incidents vs All-Companies Average (This Year)

Graham Holdings Company has 4.76% fewer incidents than the average of all companies with at least one recorded incident.

Incident Types GHC vs Education Administration Programs Industry Avg (This Year)

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

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

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SUBSIDIARY

Graham Holdings Company Subsidiaries

Parent Company

GHC

Education Administration Programs

Website: http://www.ghco.com

Company Size: 10,001+ employees

No subsidiary data available for this company.

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NEWS

Graham Holdings Company CyberSecurity News

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

March 17, 2026 10:10 AM

London Co. of Virginia Sells 1,042 Shares of Graham Holdings Company $GHC

London Co. of Virginia lessened its stake in shares of Graham Holdings Company (NYSE:GHC - Free Report) by 3.9% in the third quarter,...

Read Article

March 16, 2026 04:13 PM

DC Inno - Arlington cybersecurity firm merging with Md. firm | Local ed-tech firm hits bump in its stride

DC Inno features local news and analysis about Washington DC's startup and tech ecosystems. We also provide tools to help growing businesses scale,...

Read Article

March 12, 2026 07:35 AM

GHC SEC Filings - Graham Holdings 10-K, 10-Q, 8-K Forms

Review Graham Holdings Company (NYSE: GHC) SEC filings, including 8-Ks on senior notes and credit facilities, plus 10-Q and 10-K reports with segment and...

Read Article

March 10, 2026 09:21 PM

Graham Holdings (NYSE: GHC) director Tony Allen sells 7 Class B shares

Director Tony Allen reports selling 7 Graham Holdings Class B shares at $942.89 each, leaving him with 8 shares directly held,...

Read Article

March 02, 2026 08:00 AM

Graham Holdings Impairments Test Earnings Quality As Valuation Signals Diverge

Graham Holdings, NYSE:GHC, reported significant impairment charges tied to its 2025 results. The company also reported a sharp drop in...

Read Article

March 01, 2026 08:00 AM

JPMorgan Chase & Co. Purchases 3,286 Shares of Graham Holdings Company $GHC

JPMorgan Chase & Co. grew its position in Graham Holdings Company (NYSE:GHC - Free Report) by 15.4% during the third quarter, according to...

Read Article

February 25, 2026 08:00 AM

Graham Holdings (GHC) Gained from the Successful Turnaround of Its Kaplan Education Segment

Longleaf Partners, managed by Southeastern Asset Management, released its “Small-Cap Fund” fourth-quarter 2025 investor letter.

Read Article

February 25, 2026 08:00 AM

Graham Holdings Company Reports 2025 and Fourth Quarter Earnings

Graham Holdings Company today reported its financial results for the fourth quarter and full year of 2025. The Company also filed its Form...

Read Article

February 24, 2026 08:00 AM

Graham Holdings to pay $1.88 a share to investors in May

02/24/2026 - 11:03 AM. ARLINGTON, Va. --(BUSINESS WIRE)-- Graham Holdings Company (NYSE: GHC) today declared a regular quarterly dividend of...

Read Article

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CVE

Latest

Global CVEs (Not Company-Specific)

CVE-2026-58489

SUMMARY

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.0, the GitHub Gist export flow created an OAuth2 state value but only checked that it was present rather than validating it against the value expected for the user's session. Because the state was not properly validated, an attacker could forge a callback URL containing their own valid GitHub OAuth code. When processing the callback, HedgeDoc used the victim's logged-in session to select which note to export, but the attacker's authorization code to determine which GitHub account received it. As a result, a logged-in victim who clicked a crafted link could export their own private, protected, or limited note directly into a Gist controlled by the attacker. This issue has been fixed in version 1.11.0.

Published

Date2026-07-13

Updated

Date2026-07-13

RISK INFORMATION (Score: )

cvss4

Base Score: 6.8

Complexity: HIGH

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/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-2026-58486

SUMMARY

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load (js-yaml v3) via @hedgedoc/meta-marked, which resolved YAML anchor aliases. A compact malicious payload could therefore expand into a huge object structure, consuming excessive CPU. This expansion ran on every request to the publish view (/s/<shortid>) and, when placed under the opengraph key, the editor view (/<noteId>). A ten-level alias bomb could block the single Node.js event loop for roughly 235 seconds per request, causing concurrent requests to hang or drop and rendering the instance unavailable (DoS). Because the note was stored in the database, the impact survived process restarts until the note was removed. toobusy-js did not reliably mitigate the worst cases, as the event loop was saturated before the middleware could respond. This issue was fixed in version 1.11.0.

Published

Date2026-07-13

Updated

Date2026-07-13

RISK INFORMATION (Score: )

cvss4

Base Score: 8.3

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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-2026-58102

SUMMARY

Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate extension OID in hv_exts. When building the extension hash (via extensions(), extensions_by_long_name(), extensions_by_oid(), or has_extension_oid()), the code passes OBJ_obj2txt()'s return value as the hash-key length; because that value is the OID's full text length rather than the bytes written to the fixed-size buffer (129 bytes), an OID whose text is longer than the 129-byte buffer causes a read past the allocation, exposing adjacent heap memory as the returned hash key. extensions_by_name() uses the static shortname path and is not affected.

Published

Date2026-07-13

Updated

Date2026-07-13

RISK INFORMATION (Score: )

Impact Score

Exploitability

REFERENCES

CVE-2026-58101

SUMMARY

Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.

Published

Date2026-07-13

Updated

Date2026-07-13

RISK INFORMATION (Score: )

Impact Score

Exploitability

REFERENCES

CVE-2026-57856

SUMMARY

Cockpit CMS contains a path traversal vulnerability in the Bucket file storage API (/system/buckets/api). The api() method in modules/System/Controller/Buckets.php sanitizes the bucket name with preg_replace('/[^a-zA-Z0-9-_\\.]/','', $bucket), which permits '..' and '../' sequences. The sanitized value is interpolated into a Flysystem path as uploads://buckets/{bucket}. Flysystem's WhitespacePathNormalizer resolves 'buckets/..' to the empty string (the uploads storage root) without raising PathTraversalDetected because the '..' has a preceding component to consume. An authenticated low-privileged user can send a crafted request with a '../' bucket name to list, upload, and delete files across all buckets, including those belonging to other users or roles

Published

Date2026-07-13

Updated

Date2026-07-13

RISK INFORMATION (Score: 8.8)

cvss3

Base Score: 8.8

Complexity: LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

cvss4

Base Score: 8.7

Complexity: LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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

5.9

Exploitability

2.8

REFERENCES

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