文件
websafe-kb/08-threat-intel/registry/advisories/undici--CVE-2026-21636.json

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{
"canonical_id": "undici--CVE-2026-21636",
"system_id": "undici",
"display_name": "Undici",
"category": "frameworks",
"advisory_mode": "core",
"title": "CVE-2026-21636",
"summary": "A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution.\n\n* The issue affects users of the Node.js permission model on version v25.\n\nIn the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.",
"published_at": "2026-01-20T21:16:05.813",
"updated_at": "2026-01-30T20:20:56.843",
"severity": "critical",
"cvss_score": 10.0,
"exploit_status": "unknown",
"source_confidence": "ecosystem-authority",
"official_source_url": "https://nodejs.org/en/blog/vulnerability/december-2025-security-releases",
"secondary_source_urls": [],
"aliases": [
"CVE-2026-21636"
],
"cve_ids": [
"CVE-2026-21636"
],
"ghsa_ids": [],
"osv_ids": [],
"affected_versions": [],
"fixed_versions": [],
"package_name": null,
"render_markdown": false,
"case_path": null,
"secure_code_topics": [
"ssrf-url-validation",
"proxy-trust-boundary"
],
"status": "triage",
"triage_reasons": [
"missing affected/fixed version details"
],
"verification_status": "triage-manual",
"verification_mode": "synthetic",
"last_verified_at": null,
"last_run_id": null,
"evidence_bundle": null,
"historical_status": null,
"latest_status": null,
"browser_evidence": {
"required": false,
"present": false,
"refs": []
},
"repro_profile_id": "authz-bypass-generic",
"artifact_mode": "synthetic",
"blocked_reason": null,
"metadata": {
"source_names": [
"NVD Undici"
],
"source_kinds": [
"nvd-search"
],
"candidate_count": 1
}
}