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CVE-2026-50627

Apache Cxf vulnerability

9.1 CRITICALEPSS 0.78%
  1. Published12 Jun 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Apache Cxf≥ 4.2.0 < 4.2.2 · < 4.1.7

Remediation

Fixed in
Apache Cxf≥ 4.2.2

References

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Frequently asked

Is CVE-2026-50627 being actively exploited?

CVE-2026-50627 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.78%.

How severe is CVE-2026-50627?

CVE-2026-50627 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.78% probability of exploitation.

Which products are affected by CVE-2026-50627?

Affected products include Apache Cxf.

How do I fix CVE-2026-50627?

Upgrade affected software to a fixed version, for example Apache Cxf 4.2.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-50627 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.