{"id":"CVE-2026-21715","title":"A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.\r\n\r\nAs a result, code running under…","summary":"A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.\r\n\r\nAs a result, code running under…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-732"],"vendor":"nodejs","product":"node.js","affected":["node.js <= 20.20.1","node.js >= 22.0.0, <= 22.22.1","node.js >= 24.0.0, <= 24.14.0","node.js >= 25.0.0, <= 25.8.1"],"published":"2026-03-30","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21715","references":[{"url":"https://nodejs.org/en/blog/vulnerability/march-2026-security-releases","label":"support@hackerone.com"}],"tags":["nvd","cve.org"],"epss":0.00158,"epssPercentile":0.05341,"ingestedAt":"2026-08-19T13:39:32.858Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-04-01T14:55:13.031405Z"},"slug":"CVE-2026-21715","body":"## Overview\n\nA flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.\r\n\r\nAs a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync.native()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.\r\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.\n\n## Affected\n\n- `node.js <= 20.20.1`\n- `node.js >= 22.0.0, <= 22.22.1`\n- `node.js >= 24.0.0, <= 24.14.0`\n- `node.js >= 25.0.0, <= 25.8.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}