{"id":"CVE-2026-100227","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100227","generatedAt":"2026-10-28T00:59:45.333Z","title":"Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module.","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.","published":"2026-10-09T11:17:02.000Z","lastModified":"2026-10-16T18:09:15.000Z","status":"Analyzed","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-362"],"affected":["apache/cxf"],"epss":{"score":0.00325,"percentile":0.25402,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00173,"percentile":0.06239}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-15T18:30:14.000Z","detail":{"from":null,"score":"7.5","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.5 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-09T11:17:02.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-09T11:17:01.993Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://lists.apache.org/thread.html/pst2oopnwt2rwhvkvmt5gdgwn36kq05m","tags":["Issue Tracking","Vendor Advisory","Mailing List"],"source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/09/11","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100227","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}