CVE-2026-65583: Apache CXF: Self-issued ID token claims validation skipped

[Colm O hEigeartaigh <coheigea () apache org>]

Severity: low 

Affected versions:

- Apache CXF (org.apache.cxf:cxf-rt-rs-security-sso-oidc) 4.2.0 before 4.2.3
- Apache CXF (org.apache.cxf:cxf-rt-rs-security-sso-oidc) 4.0.0 before 4.1.8
- Apache CXF (org.apache.cxf:cxf-rt-rs-security-sso-oidc) before 3.6.12

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.

Credit:

Guanping Zhang reported this vulnerability. (finder)

References:

https://cxf.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-65583