CVE-2026-50627

Name: CVE-2026-50627
Creator: NVD / NIST
Published: 2026-06-12T10:16:22.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2026-50627 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.39%

31.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-289

Affected Software

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

References

https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mVendor Advisory
http://www.openwall.com/lists/oss-security/2026/06/11/4Mailing List, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2026-50627?

How severe is CVE-2026-50627?

CVE-2026-50627 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2026-50627?

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-2026-50627?

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

Scan your code now

Source: NVD / NIST