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Medium severity4.8NVD Advisory· Published Jun 12, 2026· Updated Aug 7, 2026

CVE-2026-50623

CVE-2026-50623

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 or 3.6.12, which fixes this issue.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.apache.cxf:cxf-rt-rs-security-oauth2Maven
>= 4.2.0, < 4.2.24.2.2
org.apache.cxf:cxf-rt-rs-security-oauth2Maven
< 4.1.74.1.7

Affected products

2
  • Apache/Cxf2 versions
    cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*range: <4.1.7
    • (no CPE)range: up to 4.2.2, 4.1.7, or 3.6.12

Patches

Vulnerability mechanics

References

4

News mentions

1