CVE-2026-57817

CRITICAL9.8

Published 2026-08-06 · Updated 2026-08-06 · Source security@apache.org

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.

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

CWE-20

References

https://lists.apache.org/thread/pj63c3pf7kkp1xhr53do704fwj3t3htn

View on NVD

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