What is GHSA-h8f8-97w2-2925?

GHSA-h8f8-97w2-2925 is a security advisory published by GitHub Security Advisories with Critical severity. The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash`...

Which CVE IDs does GHSA-h8f8-97w2-2925 cover?

GHSA-h8f8-97w2-2925 covers the following CVE IDs: CVE-2026-57817. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-h8f8-97w2-2925?

GHSA-h8f8-97w2-2925 has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-h8f8-97w2-2925CriticalCVSS 9.8

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash`...

Vendor

GitHub Security Advisories

Published

August 6, 2026

Last Modified

August 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-57817 →

📋 Description

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the c_hash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider (IdP) that omits the c_hash, the RP becomes vulnerable to Authorization Code Substitution/Injection attacks. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-57817
https://lists.apache.org/thread/pj63c3pf7kkp1xhr53do704fwj3t3htn
http://www.openwall.com/lists/oss-security/2026/08/06/19
https://github.com/advisories/GHSA-h8f8-97w2-2925