All vulnerabilities
CVE-2026-100227

Apache CXF: XML Signature wrapping in JAX-RS XML Security

Apache Software Foundation Apache CXF
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.33%Chance of exploitation activity in the next 30 days, higher than 24% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.2.4Also 4.1.9, 3.6.13CVE List
Published9 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 3

  • Apache CXFaffected: 4.2.0 before 4.2.4CVE List
  • Apache CXFaffected: 4.0.0 before 4.1.9CVE List
  • Apache CXFaffected: all versions before 3.6.13CVE List

References 1