CVE-2026-50631

Published: Jun 12, 2026Modified: Aug 7, 2026

7.4

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitability: 2.2 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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 or 3.6.12, which fixes this issue.

Affected (2)

Products: Apache: Cxf

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Apache Cxf	Before 4.1.7
Apache Cxf	From 4.2.0 to 4.2.2

Related CWEs

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

References (2)

https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8

Source: security@apache.org

Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/06/11/8

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.