CVE-2026-50631

Name: CVE-2026-50631
Creator: NVD / NIST
Published: 2026-06-12T10:16:23.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2026-50631 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

0.29%

21.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-367

Affected Software

Vendor	Product	Versions
Apache	Cxf	< 4.1.7
Apache	Cxf	>= 4.2.0, < 4.2.2

References

https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/06/11/8Mailing List, Third Party Advisory

Timeline

Published: Jun 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-50631?

How severe is CVE-2026-50631?

CVE-2026-50631 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2026-50631?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-50631?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST