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CVE-2026-50627

9.1 · CRITICAL

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens.

Published Jun 12, 2026CWE-289EPSS 0.78%

Overview

CVE-2026-50627 is a critical-severity vulnerability. It was published on June 12, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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 or 3.6.12, which fixes this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mRefwww.openwall.com/lists/oss-security/2026/06/11/4Refaccess.redhat.com/errata/RHSA-2026:37390Refaccess.redhat.com/security/cve/CVE-2026-50627Refbugzilla.redhat.com/show_bug.cgi?id=2488298Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-50627?

CVE-2026-50627 is a critical-severity vulnerability. It was published on June 12, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-50627?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-50627?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-50627?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-50627 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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