{"id":"CVE-2026-107938","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107938","generatedAt":"2026-10-28T01:01:14.237Z","title":"A network attacker able to intercept traffic could present any certificate trusted by the client, such as a publicly issued certificate for a domain they control, and impersonate the target service.","description":"In Apache CXF, the Netty-based HTTP client transport (cxf-rt-transports-http-netty-client) did not verify that the hostname in the server’s TLS certificate matched the host being called. This applied over both HTTP/1.1 and HTTP/2, even when disableCNCheck was left at its default value of false. The certificate chain was validated against the configured trust store, but the endpoint’s identity was not. A network attacker able to intercept traffic could present any certificate trusted by the client, such as a publicly issued certificate for a domain they control, and impersonate the target service. They could then read or modify the exchanged messages, including credentials. \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":"2026-10-16T18:11:30.000Z","status":"Analyzed","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-297"],"affected":["apache/cxf"],"epss":{"score":0.00194,"percentile":0.0902,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00115,"percentile":0.01468}]},"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 (0.19%). 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":"9.1","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.1 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-09T11:17:02.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-09T11:17:02.213Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://lists.apache.org/thread.html/ljsjsq1foyjy1v5o22oncw80twx7k2tc","tags":["Issue Tracking","Vendor Advisory"],"source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/09/13","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107938","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."}