How severe is CVE-2026-50627?

CVE-2026-50627 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-50627 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50627?

CVE-2026-50627 affects Apache Cxf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50627?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-50627 have an EU (EUVD) identifier?

Yes. CVE-2026-50627 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36395.

When was CVE-2026-50627 published?

CVE-2026-50627 was published on 2026-06-12 and last updated on 2026-07-02.

CVE-2026-50627

CVE-2026-50627 is a critical-severity vulnerability in Apache Cxf with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-289.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36395
Weakness: CWE-289
Affected product: Apache Cxf
Published: 2026-06-12
Last modified: 2026-07-02

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.

Frequently asked questions

What is CVE-2026-50627?: 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.
How severe is CVE-2026-50627?: CVE-2026-50627 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-50627 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-50627?: CVE-2026-50627 affects Apache Cxf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50627?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-50627 have an EU (EUVD) identifier?: Yes. CVE-2026-50627 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36395.
When was CVE-2026-50627 published?: CVE-2026-50627 was published on 2026-06-12 and last updated on 2026-07-02.

References

Affected products (1)

cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*

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