CVE-2026-57817

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.

Score
CVSS 3.1 8.1 High
Status
Modified - security@apache.org
Published
2026-08-06
Last modified
2026-10-24
Weaknesses
CWE-20

Affected products

References

 
 
© AVABIS GmbH privacypolicy about