EUVD-2026-53859
GHSA-9rwm-8rh4-8q53
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Non-default configuration required (AC:H); attacker submits forged token unauthenticated over network (AV:N/PR:N); full identity impersonation grants high C and I with no availability impact.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
Lifecycle Timeline
2DescriptionCVE.org
Apache CXF’s OIDC relying-party token validation could accept self-issued ID tokens without enforcing required claim checks (issuer/subject/audience/time and sub_jwk binding), enabling authentication bypass with crafted tokens. However, note that self-issued ID tokens are not accepted by default in the validator. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fixes this issue.
Articles & Coverage 1
AnalysisAI
Authentication bypass in Apache CXF's OIDC relying-party implementation allows network-accessible attackers to forge self-issued ID tokens that skip all required OpenID Connect claim checks - issuer, subject, audience, time bounds, and sub_jwk binding - effectively impersonating any user identity. Affected are all Apache CXF versions prior to 4.2.3, 4.1.8, and 3.6.12 when the relying party is explicitly configured to accept self-issued OIDC tokens, a non-default setting. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the Apache CXF relying-party has been explicitly configured to accept self-issued OIDC ID tokens - this is a non-default setting that must be deliberately opted into by the application operator. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | No official CVSS vector or EPSS score was provided; all scoring is analyst-derived. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to upgrade Apache CXF to version 4.2.3, 4.1.8, or 3.6.12 depending on the branch in use; all three releases contain the claim validation enforcement fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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