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.

Severity (CVSS)

Base score8.1
SeverityHigh
VersionCVSS 3.1
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Provided byCISA-ADP

Weaknesses

  • CWE-20 — CWE-20 Improper Input Validation

Affected products

VendorProductVersions
Apache Software FoundationApache CXF4.2.0 to <4.2.3; 4.0.0 to <4.1.8; 0 to <3.6.12

References

Authoritative sources

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Generated from the official CVE List on 07 Aug 2026 07:02 UTC.