CVE-2026-50623GHSA-542G-M3FX-Q86F
Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.2.2, 4.1.7, 3.6.12
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- org.apache.cxf:cxf-rt-rs-security-oauth2
From 4.2.0 · fixed in 4.2.2; From 4.0.0 · fixed in 4.1.7; fixed in 3.6.12
- org.apache.cxf:cxf-rt-rs-security-oauth2Maven
From 4.2.0 · fixed in 4.2.2
- org.apache.cxf:cxf-rt-rs-security-oauth2Maven
fixed in 4.1.7