CVE-2026-57818 Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider

A race condition in JCacheCodeDataProvider allows an attacker to redeem a single authorization code multiple times via concurrent requests, resulting in the issuance of multiple distinct, valid access tokens. Users are recommended to upgrade to versions 4.2.3, 4.1.8 or 3.6.12, which fix this issu...

CVE-2026-57818

The vulnerability CVE-2026-57818 affects the JCacheCodeDataProvider used in Apache CXF’s OAuth2 implementation. A TOCTOU race condition allows an attacker to redeem a single authorization code multiple times through concurrent requests, causing issuance of multiple distinct, valid access tokens. ...

CVE-2026-68079

In Apache CXF's DefaultEncryptingCodeDataProvider, a captured authorization code can be redeemed an unlimited number of times due to a flaw in the implementation of the removeCodeGrant functionality. This violates the RFC requirement that "The authorization code MUST NOT be used more than once."...