{"id":"CVE-2026-100227","published":"2026-10-09T11:17:01.993","lastModified":"2026-10-15T18:17:21.280","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.\nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-362"],"vendors":[],"products":[],"references":[{"url":"https://lists.apache.org/thread.html/pst2oopnwt2rwhvkvmt5gdgwn36kq05m","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/09/11","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw allows attackers to bypass XML signature verification by wrapping signed documents with unsigned content, potentially leading to unauthorized data processing. This occurs because the JAX-RS XML Security interceptors fail to ensure that all XML content passed to applications is actually covered by the signature.","exploitability":"Exploitation requires an attacker to have access to a document signed by a trusted key and the ability to wrap it with unsigned content, making it moderately difficult but possible to exploit.","blast_radius":"If exploited, this vulnerability could allow attackers to process unsigned XML content as if it were signed, potentially leading to unauthorized data manipulation or processing in applications that rely on XML signatures for security.","remediation":"Upgrade to Apache CXF versions 4.2.4, 4.1.9, or 3.6.13 which contain the fix for this signature verification issue.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["xml","signature","security"],"model":"garnet-coder","analyzedAt":"2026-10-17T09:02:47.390Z"}}