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 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.
- CVSS 3.1
- 4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-25)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apache:cxf
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-542g-m3fx-q86f | Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | >=4.2.0 <4.2.2 | 4.2.2 |
| GHSA-542g-m3fx-q86f | Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | <4.1.7 | 4.1.7 |