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CVE

CVE-2026-50627

Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator
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CVE

CVE-2026-50627

Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-50627, https://access.redhat.com/errata/RHSA-2026:37390, https://access.redhat.com/security/cve/CVE-2026-50627, https://bugzilla.redhat.com/show_bug.cgi?id=2488298, https://github.com/apache/cxf, https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m, https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json, http://www.openwall.com/lists/oss-security/2026/06/11/4

Severity

9.1

CVSS Score
0
10

Basic Information

Base CVSS
9.1
EPSS Probability
0.00776%
EPSS Percentile
0.54249%
Introduced Version
4.2.0,4.0.0,3.1.8
Fix Available
4.2.2,4.1.7,3.6.12

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