CVE-2026-50623
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk40th percentile — higher than 40% of all known CVEs
Summary
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.
Risk Assessment
The organization may be exposed to unauthorized access to data if authentication is not enabled on the service. This could lead to data leaks or other serious security incidents.
Recommendation
It is recommended to upgrade to version 4.2.2 or 4.1.7, which fix this issue. Also, ensure that authentication is enabled on all services.
Original NVD description (English source)
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.