GHSA-542g-m3fx-q86f
Apache CXF has Authentication Bypass in OAuth2 TokenIntrospectionService
At a glance
- Published
- Updated
- CVE
- CVE-2026-50623
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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.
Affected packages
| Package | Versions |
|---|---|
| Maven · org.apache.cxf:cxf-rt-rs-security-oauth2 | introduced 4.2.0, fixed 4.2.2 |
| Maven · org.apache.cxf:cxf-rt-rs-security-oauth2 | introduced 0, fixed 4.1.7 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-50623 ADVISORY
- https://github.com/apache/cxf PACKAGE
- https://lists.apache.org/thread/ydzj8m5mqmjy13xgyj9mkk9hfff63qq7 WEB
- http://www.openwall.com/lists/oss-security/2026/06/11/3 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |