CVE-2026-65583: CWE-345 Insufficient Verification of Data Authenticity in Apache Software Foundation Apache CXF
Apache CXF versions prior to 4.2.3, 4.1.8, and 3.6.12 contain a vulnerability in the OIDC relying-party token validation process. This flaw allows acceptance of self-issued ID tokens without enforcing critical claim checks such as issuer, subject, audience, time, and sub_jwk binding, potentially enabling authentication bypass with crafted tokens. By default, self-issued ID tokens are not accepted, mitigating some risk. Upgrading to versions 4.2.3, 4.1.8, or 3.6.12 addresses this issue.
AI Analysis
Technical Summary
CVE-2026-65583 is a critical vulnerability in Apache CXF's OpenID Connect (OIDC) relying-party token validation. The vulnerability arises because the validator could accept self-issued ID tokens without enforcing required claim checks, including issuer, subject, audience, time validity, and sub_jwk binding. This insufficient verification of data authenticity (CWE-345) can lead to authentication bypass if an attacker crafts tokens exploiting this weakness. The vulnerability affects multiple versions of Apache CXF prior to 4.2.3, 4.1.8, and 3.6.12. Notably, self-issued ID tokens are not accepted by default, which reduces exposure unless explicitly enabled. The issue is fixed in the recommended upgraded versions.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to bypass authentication by presenting crafted self-issued ID tokens that are accepted without proper claim validation. This can lead to unauthorized access to systems relying on Apache CXF for OIDC authentication. The vulnerability has a CVSS score of 9.1 (critical), indicating high impact on confidentiality and integrity with no required privileges or user interaction.
Mitigation Recommendations
Users should upgrade Apache CXF to versions 4.2.3, 4.1.8, or 3.6.12 where this vulnerability is fixed. Since self-issued ID tokens are not accepted by default, users who do not enable this feature are less exposed. No other mitigations are specified. Patch status is not explicitly stated but the recommended versions indicate an official fix is available.
CVE-2026-65583: CWE-345 Insufficient Verification of Data Authenticity in Apache Software Foundation Apache CXF
Description
Apache CXF versions prior to 4.2.3, 4.1.8, and 3.6.12 contain a vulnerability in the OIDC relying-party token validation process. This flaw allows acceptance of self-issued ID tokens without enforcing critical claim checks such as issuer, subject, audience, time, and sub_jwk binding, potentially enabling authentication bypass with crafted tokens. By default, self-issued ID tokens are not accepted, mitigating some risk. Upgrading to versions 4.2.3, 4.1.8, or 3.6.12 addresses this issue.
CVSS v3.1
Score 9.1critical
Affected software
Apache Software Foundation
Apache CXF
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-sso-oidcRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-65583 is a critical vulnerability in Apache CXF's OpenID Connect (OIDC) relying-party token validation. The vulnerability arises because the validator could accept self-issued ID tokens without enforcing required claim checks, including issuer, subject, audience, time validity, and sub_jwk binding. This insufficient verification of data authenticity (CWE-345) can lead to authentication bypass if an attacker crafts tokens exploiting this weakness. The vulnerability affects multiple versions of Apache CXF prior to 4.2.3, 4.1.8, and 3.6.12. Notably, self-issued ID tokens are not accepted by default, which reduces exposure unless explicitly enabled. The issue is fixed in the recommended upgraded versions.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to bypass authentication by presenting crafted self-issued ID tokens that are accepted without proper claim validation. This can lead to unauthorized access to systems relying on Apache CXF for OIDC authentication. The vulnerability has a CVSS score of 9.1 (critical), indicating high impact on confidentiality and integrity with no required privileges or user interaction.
Mitigation Recommendations
Users should upgrade Apache CXF to versions 4.2.3, 4.1.8, or 3.6.12 where this vulnerability is fixed. Since self-issued ID tokens are not accepted by default, users who do not enable this feature are less exposed. No other mitigations are specified. Patch status is not explicitly stated but the recommended versions indicate an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-07-22T09:50:56.542Z
- State
- PUBLISHED
Threat ID: 6a74768abf8831d539a9b736
Added to database: 08/06/2026, 11:56:58 UTC
Last enriched: 08/13/2026, 16:58:54 UTC
Last updated: 09/18/2026, 00:02:57 UTC
Views: 55
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