CVE-2026-21715
Published: Mar 30, 2026
Modified: Apr 1, 2026
CVSS v3.0
3.3
Description
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.
| Vendor | Product | Versions |
|---|---|---|
nodejs | node | affected 20.20.1 - <= 20.20.1affected 22.22.1 - <= 22.22.1affected 24.14.0 - <= 24.14.0affected 25.8.1 - <= 25.8.1affected 4.0 - < 4.*+15 more versions |
CVSS v3.0 Details
CVSS v3.0 Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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