{"affected":[{"defaultStatus":"unaffected","product":"node","source":"CNA: openjs","vendor":"nodejs","versions":[{"lessThan":"22.23.5","status":"affected","version":"0.0.0","versionType":"semver"},{"lessThan":"24.22.3","status":"affected","version":"23.0.0","versionType":"semver"},{"lessThan":"26.13.1","status":"affected","version":"25.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-123867","cwes":["CWE-295"],"description":"A per-host mutual-TLS authorization bypass in Node.js lets a client authorized for the default hostname reach a protected hostname it is not authorized for. When a TLS server assigns a hostname a different client-certificate CA with server.addContext(host, { ca: protectedCA }) but no server certificate in that SNI context, the per-host client CA is never installed and the handshake falls back to the default client CA. In src/crypto/crypto_tls.cc, CertCbDone installs the SNI context's CA only when setSniContext succeeds, but setSniContext returns false for a context with no server certificate, so a CA-only SNI context silently keeps the default CA. A client holding a certificate trusted by the default CA, but not the protected CA, can therefore complete mTLS to the protected hostname and read its response even with requestCert and rejectUnauthorized enabled, while a client certified by the protected CA is rejected. This vulnerability affects Node.js 26.x, 24.x, and 22.x.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":4.2,"severity":"medium","source":"CNA: openjs","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.0"}],"modifiedAt":1794421392991,"publishedAt":1794421392991,"references":[{"source":"CNA: openjs","tags":["vendor-advisory"],"url":"https://nodejs.org/en/blog/vulnerability/november-2026-security-releases"},{"source":"CNA: openjs","tags":[],"url":"https://cna.openjsf.org/security-advisories.html"}],"remediation":[],"revision":"61ba5f3d70aec2f00fceef1b4f92778d30c99dce357ffeea1855805da3049838","sources":[{"modifiedAt":1794421392991,"name":"CNA: openjs","retrievedAt":1794424113733,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123867"}],"ssvc":null,"status":"published","title":"Node.js is vulnerable to a per-host mTLS authorization bypass via a CA-only SNI context failing open to the default CA","updatedAt":1794424113733}