CVE-2026-50631 Details
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.
A race condition vulnerability has been identified in Apache CXF versions 4.2.0 prior to 4.2.2 and in versions prior to 4.1.7. This vulnerability allows concurrent requests using the same refresh token to bypass the intended single-use restriction, enabling the generation of multiple valid access tokens. This issue arises when the 'recycleRefreshTokens' option is set to false. A leaked refresh token can be exploited concurrently by multiple attackers or threads, leading to unauthorized access.
Users are advised to upgrade to Apache CXF versions 4.2.2 or 4.1.7, both of which address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/06/11/8 | CVE | Mailing ListThird Party Advisory |
| https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache cxf | < 4.1.7 >= 4.2.0, < 4.2.2 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 7, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | Initial Analysis | [email protected] |
| Jun 12, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | New CVE Received | [email protected] |
| Jun 12, 2026 | CVE Modified | CVE |