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Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

Apache Software Foundation Apache CXF · CVE-2026-50623
0 news outlets0 CERTs and agencies0 researchers

What is it?

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 or 3.6.12, which fixes this issue.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
4.8
EPSS
0.5%
First seen
7 d ago
Status
corroborated

All Apache Software Foundation vulnerabilities