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Medium severity4.8NVD Advisory· Published Jun 12, 2026· Updated Jun 16, 2026

CVE-2026-50623

CVE-2026-50623

Description

An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 4.2.2 or 4.1.7, which fixes this issue.

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Affected products

2
  • Apache/Cxf2 versions
    cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*range: <4.1.7
    • (no CPE)range: <4.2.2, <4.1.7

Patches

Vulnerability mechanics

References

2

News mentions

1