CVE-2026-100227: Apache CXF: XML Signature wrapping in JAX-RS XML Security
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache CXFto a version that resolves this vulnerability.Fixed in 4.2.4 - Upgrade
Upgrade
Apache CXFto a version that resolves this vulnerability.Fixed in 4.1.9 - Upgrade
Upgrade
Apache CXFto a version that resolves this vulnerability.Fixed in 3.6.13
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Deployments using Apache CXF's JAX-RS XML Security module with the XmlSigInHandler, XmlSigInInterceptor, or streaming XmlSecInInterceptor are affected if they rely on these interceptors to verify XML signatures before passing XML to the application.
What does an attacker need to exploit it?
The attacker needs any XML document signed by a trusted key. They can wrap that signed document in unsigned content, which the application may then treat as signed.
How can this be remediated?
Upgrade Apache CXF to version 4.2.4, 4.1.9, or 3.6.13, depending on the supported release line in use.