CVE-2026-100227: Vulnerability in Apache Software Foundation Apache CXF
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.
Affected software
Apache Software Foundation
Apache CXF
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-xmlRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Apache CXF's JAX-RS XML Security module involves the XmlSigInHandler, XmlSigInInterceptor, and streaming XmlSecInInterceptor not verifying that the entire XML content processed by the application is covered by the cryptographic signature. This allows an attacker possessing any document signed by a trusted key to embed it within unsigned content, which the application mistakenly accepts as signed. This flaw compromises the integrity verification of XML messages processed by the affected interceptors.
Potential Impact
An attacker can exploit this vulnerability to bypass XML signature verification by wrapping a legitimately signed XML document inside unsigned content. This may lead to the application accepting manipulated or malicious XML data as if it were properly signed and trusted, potentially undermining security controls relying on XML signature validation.
Mitigation Recommendations
Users should upgrade Apache CXF to version 4.2.4, 4.1.9, or 3.6.13 or later, where this vulnerability has been fixed. Applying these official fixes is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-09-25T15:15:43.370Z
- State
- PUBLISHED
Threat ID: 6ac8c31f2cdf04f6564c0cd2
Added to database: 10/09/2026, 10:34:07 UTC
Last enriched: 10/09/2026, 10:49:42 UTC
Last updated: 10/09/2026, 18:57:32 UTC
Views: 16
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