GitHub Advisoryadvisory · Maven

GHSA-542g-m3fx-q86f Apache CXF has Authentication Bypass in OAuth2 TokenIntrospectionService

MEDIUM Published 2026-06-12 Modified 2026-08-20 Official page ↗
Aliases
CVE-2026-50623
Ecosystem
Maven
Packages
org.apache.cxf:cxf-rt-rs-security-oauth2
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-287
Reviewed
2026-08-20

Affected packages

• Maven org.apache.cxf:cxf-rt-rs-security-oauth2: >= 4.2.0, < 4.2.2 → fixed in 4.2.2 • Maven org.apache.cxf:cxf-rt-rs-security-oauth2: < 4.1.7 → fixed in 4.1.7

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.

Related

Alias · CVE (1)

  • CVE-2026-50623 An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. vulnerability

Weakness · CWE (1)

  • CWE-287 Improper Authentication weakness

References