UnratedApache Software Foundation Updated

Unknown [CVE-2026-57817] Apache CXF RP: The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash` parameter when operating in the Hybrid Flow

This security Apache Software Foundation advisory covers CVE-2026-57817 affecting Apache CXF RP.

CVE-2026-57817 Published Aug 6, 2026Updated by vendor Aug 6, 2026

CVE-2026-57817

Affected products & platforms

Apache Software FoundationUnclassified

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Summary

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 versions

Apache CXF 4.2.0 before 4.2.3
Apache CXF 4.0.0 before 4.1.8
Apache CXF before 3.6.12

Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source

Fixed versions

4.2.3
4.1.8
3.6.12

Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-57817 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-57817NVD CVE.org MITRE

Official resources

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