CVE-2026-50623: An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context…

PriorityP432medium4.8CVSS 3.1

AVNACHPRNUINSUCLILAN

EPSS

0.37%

29.4th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
apache	cxf	< 4.1.7	4.1.7
apache	cxf	>= 4.2.0 < 4.2.2	4.2.2
apache_software_foundation	apache_cxf	< 4.1.7	4.1.7
apache_software_foundation	apache_cxf	>= 4.2.0 < 4.2.2	4.2.2

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