CVE-2026-50631: A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple…

PriorityP349high7.4CVSS 3.1

AVNACHPRNUINSUCHIHAN

EPSS

0.29%

21.3th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
apache	cxf	< 4.1.7	4.1.7
apache	cxf	>= 4.2.0 < 4.2.2	4.2.2
apache_software_foundation	apache_cxf	< 4.1.7	4.1.7
apache_software_foundation	apache_cxf	>= 4.2.0 < 4.2.2	4.2.2

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