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CVE-2026-57817 The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash` parameter when operating in…

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.

Affected products and versions

Product Affected versions Fixed in
Apache CXF 4.2 4.2.0 → < 4.2.3 4.2.3
Apache CXF 4.0 4.0.0 → < 4.1.8 4.1.8
Apache CXF 3.6 earliest → < 3.6.12 3.6.12

References

Timeline

  1. Published
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