{"id":"CVE-2026-21711","title":"A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.\r\n\r\nAs a result, code running unde…","summary":"A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.\r\n\r\nAs a result, code running unde…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-284"],"vendor":"nodejs","product":"node.js","affected":["node.js < 20.0.0","node.js >= 25.0.0, <= 25.8.1"],"patched":["node.js 20.0.0"],"published":"2026-03-30","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21711","references":[{"url":"https://nodejs.org/en/blog/vulnerability/march-2026-security-releases","label":"support@hackerone.com"}],"tags":["nvd"],"epss":0.00175,"epssPercentile":0.07285,"ingestedAt":"2026-08-19T14:40:19.164Z","slug":"CVE-2026-21711","body":"## Overview\n\nA flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.\r\n\r\nAs a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.\r\n\r\nThis vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.\n\n## Affected\n\n- `node.js < 20.0.0`\n- `node.js >= 25.0.0, <= 25.8.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `node.js 20.0.0`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}