CVE-2026-100227: Apache Software Foundation Apache Cxf

EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Software Foundation Apache Cxf: from 4.2.0, before 4.2.4 (fixed in 4.2.4); from 4.0.0, before 4.1.9 (fixed in 4.1.9); before 3.6.13 (fixed in 3.6.13)

Published 2026-10-09. Last modified 2026-10-09.