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. As 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. This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.
| Reporter | Title | Published | Views | Family All 138 |
|---|---|---|---|---|
 | CVE-2026-21715 | 30 Mar 202619:07 | – | attackerkb |
 | Amazon Linux 2023 : nodejs22, nodejs22-devel, nodejs22-full-i18n (ALAS2023-2026-1576) | 13 Apr 202600:00 | – | nessus |
| Amazon Linux 2023 : nodejs20, nodejs20-devel, nodejs20-full-i18n (ALAS2023-2026-1577) | 13 Apr 202600:00 | – | nessus |
| Amazon Linux 2023 : nodejs24, nodejs24-devel, nodejs24-full-i18n (ALAS2023-2026-1578) | 13 Apr 202600:00 | – | nessus |
| AlmaLinux 9 : nodejs:24 (ALSA-2026:7350) | 16 Apr 202600:00 | – | nessus |
| AlmaLinux 8 : nodejs:24 (ALSA-2026:7670) | 16 Apr 202600:00 | – | nessus |
| AlmaLinux 10 : nodejs24 (ALSA-2026:7675) | 15 Apr 202600:00 | – | nessus |
| Debian dsa-6183 : libnode-dev - security update | 29 Mar 202600:00 | – | nessus |
| Fedora 42 : nodejs20 (2026-0f43f09cd9) | 14 May 202600:00 | – | nessus |
| Fedora 44 : nodejs22 (2026-3b76d8047d) | 8 May 202600:00 | – | nessus |
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09 Apr 2026 08:40Current
6.6Medium risk
Vulners AI Score6.6
CVSS 33.3
CVSS 3.13.3
EPSS0.00158