{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123877", "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "state": "PUBLISHED", "assignerShortName": "openjs", "dateReserved": "2026-11-06T16:32:30.304Z", "datePublished": "2026-11-11T18:28:38.494Z", "dateUpdated": "2026-11-11T18:28:38.494Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "shortName": "openjs", "dateUpdated": "2026-11-11T18:28:38.494Z"}, "title": "Node.js is vulnerable to a certificate validation bypass in https.Agent via cross-policy TLS session reuse", "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/markdown", "base64": false, "value": "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."}]}], "credits": [{"lang": "en", "value": "aegis1337 and mickeyjoe", "type": "reporter"}, {"lang": "en", "value": "mcollina", "type": "remediation developer"}, {"lang": "en", "value": "aduh95", "type": "coordinator"}], "affected": [{"vendor": "nodejs", "product": "node", "defaultStatus": "unaffected", "versions": [{"version": "0.0.0", "status": "affected", "lessThan": "22.23.5", "versionType": "semver"}, {"version": "23.0.0", "status": "affected", "lessThan": "24.22.3", "versionType": "semver"}, {"version": "25.0.0", "status": "affected", "lessThan": "26.13.1", "versionType": "semver"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-295", "description": "Improper Certificate Validation"}]}], "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://nodejs.org/en/blog/vulnerability/november-2026-security-releases", "tags": ["vendor-advisory"]}, {"url": "https://cna.openjsf.org/security-advisories.html"}], "x_generator": {"engine": "nodejs-private/security-release publish-cves"}}}}

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