CVE-2026-65583 Apache CXF: Self-issued ID token claims validation skipped
Attackers can bypass authentication using crafted self-issued ID tokens if the validator is configured to accept them, requiring an upgrade to secure versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-65583?
CVE-2026-65583 is a critical authentication bypass vulnerability in Apache Cxf, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-345
Which versions are affected by CVE-2026-65583?
It affects 1 product.
Products include Apache Cxf.
How do I fix CVE-2026-65583?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-65583 being exploited?
There is no known exploitation of CVE-2026-65583 in the wild and no public exploit code.
Other vulnerabilities in Apache Cxf
- CVE-2012-2379 XML Signature/Encryption Not Validated in Apache CXF
- CVE-2026-66909 Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage
- CVE-2026-68079 Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay
- CVE-2026-50628 Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
- CVE-2025-48913 Apache CXF: Untrusted JMS configuration can lead to RCE
Sources
Also known as GHSA-9rwm-8rh4-8q53.