CVE-2026-50631
Fixed upstream EPSS <1%CVSS 7.4
A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or threads. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.
Products: Apache Software Foundation Apache CXF
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | 4.2.2 |
| Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | 4.1.7 |