CVE-2026-21715 (GCVE-0-2026-21715)
Vulnerability from cvelistv5
Published
2026-03-30 19:07
Modified
2026-04-01 15:02
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. 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.
Impacted products
Vendor Product Version
nodejs node Version: 20.20.1    20.20.1
Version: 22.22.1    22.22.1
Version: 24.14.0    24.14.0
Version: 25.8.1    25.8.1
Version: 4.0   
Version: 5.0   
Version: 6.0   
Version: 7.0   
Version: 8.0   
Version: 9.0   
Version: 10.0   
Version: 11.0   
Version: 12.0   
Version: 13.0   
Version: 14.0   
Version: 15.0   
Version: 16.0   
Version: 17.0   
Version: 18.0   
Version: 19.0   
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Show details on NVD website


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          "value": "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 `--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."
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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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