CVE-2026-50631

7.4 HIGH

A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and ...

Published: 2026-06-12 · Last updated: 2026-06-12

Severity and scoring

CVSS: 7.4 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-367

Affected products

Vendor	Product
apache	cxf

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-50631
[Vendor advisory]https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8
[Other]http://www.openwall.com/lists/oss-security/2026/06/11/8

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