CVE-2026-57817

HIGH CVSS 8.1 View on NVD ↗

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:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

apache/cxf

References

https://lists.apache.org/thread/pj63c3pf7kkp1xhr53do704fwj3t3htn
http://www.openwall.com/lists/oss-security/2026/08/06/19

Published: Aug 06, 2026 11:16 UTC Modified: Aug 07, 2026 05:17 UTC