CVE-2026-50623

6.5 MEDIUM

An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF

Published: 2026-06-12 · Last updated: 2026-06-12

Severity and scoring

CVSS: 6.5 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE: CWE-287

Affected products

Vendor	Product
apache	cxf

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-50623
[Vendor advisory]https://lists.apache.org/thread/ydzj8m5mqmjy13xgyj9mkk9hfff63qq7
[Other]http://www.openwall.com/lists/oss-security/2026/06/11/3

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