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CVE-2026-61466

Apache Cxf vulnerability

9.1 CRITICALEPSS 0.71%
  1. Published6 Aug 2026

Description

In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Apache Cxf≥ 4.0.0 < 4.1.8 · ≥ 4.2.0 < 4.2.3 · < 3.6.12

Remediation

Fixed in
Apache Cxf≥ 4.1.8

References

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Frequently asked

Is CVE-2026-61466 being actively exploited?

CVE-2026-61466 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.71%.

How severe is CVE-2026-61466?

CVE-2026-61466 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.71% probability of exploitation.

Which products are affected by CVE-2026-61466?

Affected products include Apache Cxf.

How do I fix CVE-2026-61466?

Upgrade affected software to a fixed version, for example Apache Cxf 4.1.8 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-61466 against the real software inventory on every managed device, as each hourly inventory arrives. 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.