Bug 2511995 (CVE-2026-65583)

Summary: CVE-2026-65583 org.apache.cxf/cxf: Apache CXF: Authentication Bypass via Crafted OIDC Self-Issued ID Tokens
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: anujha, asoldano, bbaranow, bmaxwell, bstansbe, csutherl, dlofthou, dsoumis, fmariani, gmalinko, istudens, ivassile, iweiss, janstey, jclere, jwon, mcarlett, mosmerov, msvehla, nwallace, pberan, pesilva, pjindal, plodge, pmackay, rmaucher, rstancel, rstepani, szappis, tcunning, thjenkin, vdosoudi, yfang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Apache CXF. The OpenID Connect (OIDC) relying-party token validation in Apache CXF could accept specially crafted self-issued ID tokens. This bypasses necessary claim checks, such as issuer, subject, audience, and time, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by presenting a malicious token.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-06 11:52:18 UTC
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.