{
  "cve": [
    "CVE-2026-21715"
  ],
  "vulnerable": "20.x || 22.x || 24.x || 25.x",
  "patched": "^20.20.2 || ^22.22.2 || ^24.14.1 || ^25.8.2",
  "ref": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases",
  "description": "Permission Model Bypass in realpathSync.native Allows File Existence Disclosure",
  "overview": "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.\n\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.\n\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.",
  "affectedEnvironments": [
    "all"
  ],
  "severity": "low"
}