CVE-2026-100227

High

Description

Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Apache Cxf

PublishedOct 9, 2026

First seenOct 9, 2026

Weakness typeCWE-362Race condition

How to fix

Update

apache cxf3.6.13, 4.1.9, 4.2.4 or later

Vendor advisories

lists.apache.org/thread.html/pst2oopnwt2rwhvkvmt5gdgwn36kq05m

Affected products

Product	Affected versions	Fixed in
apache cxf	v < 3.6.13, 4.0.0 ≤ v < 4.1.9, 4.2.0 ≤ v < 4.2.4	3.6.13, 4.1.9, 4.2.4

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