CVE-2026-50631 (GCVE-0-2026-50631)

Vulnerability from cvelistv5 – Published: 2026-06-12 08:59 – Updated: 2026-08-07 12:43
VLAI
Title
Apache CXF: OAuth2: TOCTOU Race Condition in Refresh Token Processing
Summary
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.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-12 14:03 UTC
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache CXF Affected: 4.2.0 , < 4.2.2 (semver)
Affected: 4.0.0 , < 4.1.7 (semver)
Affected: 0 , < 3.6.12 (semver)
guessed Create a notification for this product.
Credits
Guanping Zhang reported this vulnerability.
Show details on NVD website
To clipboard 

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