{"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-2026-123877","cwes":["CWE-295"],"description":"A certificate validation bypass in Node.js https.Agent lets a cached TLS session authenticated under one CA policy be reused by a later request with a stricter policy. https.Agent.prototype.getName() assigns the same Agent and session-cache key to a request that omits ca and one that explicitly supplies ca: [], because an omitted value appends nothing to the key while an empty array stringifies to an empty string. The two policies differ: omitting ca uses the default trust store, while supplying ca replaces it. Since they share a key, a TLS session authenticated under the broader default policy is handed to a new connection made under the later ca: [] policy, and TLS 1.3 session resumption carries the earlier authentication forward, so the second request reports authorized === true and transmits confidential data to a server its own CA policy would reject on a fresh connection. This vulnerability affects Node.js 26.x, 24.x, and 22.x.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.8,"severity":"medium","source":"CNA: openjs","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.0"}],"modifiedAt":1794421718494,"publishedAt":1794421718494,"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":"a816fb0a7755f4553fc3e63e40ea994dcb6951ad9845cc19e014da609d86a41a","sources":[{"modifiedAt":1794421718494,"name":"CNA: openjs","retrievedAt":1794424120709,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123877"}],"ssvc":null,"status":"published","title":"Node.js is vulnerable to a certificate validation bypass in https.Agent via cross-policy TLS session reuse","updatedAt":1794424120709}