CVE-2026-65583 is a vulnerability in Apache CXF's OIDC relying-party token validation logic in the org.apache.cxf:cxf-rt-rs-security-sso-oidc component. In affected versions, the validator could accept self-issued ID tokens without enforcing required claim validation checks, including issuer, subject, audience, time-based validation, and sub_jwk binding. This insufficient authenticity verification allows a crafted self-issued ID token to be treated as valid under vulnerable configurations, resulting in an authentication bypass condition. The issue affects Apache CXF 4.2.0 before 4.2.3, 4.0.0 before 4.1.8, and versions before 3.6.12 in the 3.6.x line. Self-issued ID tokens are not accepted by default, which limits exposure to deployments that explicitly enable or rely on this behavior.
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An authentication bypass vulnerability in Apache CXF OIDC relying-party token validation where self-issued ID tokens could be accepted without required claim validation checks.
An authentication bypass vulnerability in Apache CXF's OIDC relying-party token validation that could allow acceptance of crafted self-issued ID tokens without required claim validation checks.
An authentication bypass vulnerability in Apache CXF OIDC relying-party token validation where self-issued ID tokens may be accepted without required claim validation checks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.