Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, `Deno.FsFile.prototype.utime` and `Deno.FsFile.prototype.utimeSync` are not limited by the permission model check `--deny-write=./`. It's possible to change to change the access (`atime`) and modification (`mtime`) times on the file stream resource even when the file is opened with `read` only permission (and `write`: `false`) and file write operations are not allowed (the script is executed with `--deny-write=./`). Similar APIs like `Deno.utime` and `Deno.utimeSync` require `allow-write` permission, however, when a file is opened, even with read only flags and deny-write permission, it's still possible to change the access (`atime`) and modification (`mtime`) times, and thus bypass the permission model. Versions 2.5.3 and 2.2.15 fix the issue.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739b Patch
- https://github.com/denoland/deno/pull/30872 Issue Tracking, Patch
- https://github.com/denoland/deno/security/advisories/GHSA-vg2r-rmgp-cgqj Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 3.3 · denoNVD modified 2026-10-08 13:10
Affected (CPE criteria) 1
cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*
References 5
- https://github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739b Patch
- https://github.com/denoland/deno/pull/30872 Issue Tracking, Patch
- https://github.com/denoland/deno/releases/tag/v2.2.15 Release Notes
- https://github.com/denoland/deno/releases/tag/v2.5.3 Release Notes
- https://github.com/denoland/deno/security/advisories/GHSA-vg2r-rmgp-cgqj Exploit, Vendor Advisory