CVE-2026-50631
HighCVSS 7.4Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
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.
Risk Assessment
This allows multiple attackers or threads to replay a leaked refresh token concurrently, potentially leading to unauthorized access to resources.
Recommendation
Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.
Original NVD description (English source)
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, which fixes this issue.