CVE-2025-61786
Deno's --deny-read check does not prevent permission bypass
- State
- Published
- Severity
- 3.3 Low
- Published
- Oct 8, 2025
- Updated
- Oct 8, 2025
- Reserved
- Sep 30, 2025
Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, `Deno.FsFile.prototype.stat` and `Deno.FsFile.prototype.statSync` are not limited by the permission model check `--deny-read=./`. It's possible to retrieve stats from files that the user do not have explicit read access to (the script is executed with `--deny-read=./`). Similar APIs like `Deno.stat` and `Deno.statSync` require `allow-read` permission, however, when a file is opened, even with file-write only flags and deny-read permission, it's still possible to retrieve file stats, and thus bypass the permission model. Versions 2.5.3 and 2.2.15 fix the issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-269 Improper Privilege Management
Affected Products
| Product | Versions |
|---|---|
denodenoland |
|
References
- https://github.com/denoland/deno/security/advisories/GHSA-qq26-84mh-26j9
- https://github.com/denoland/deno/pull/30876
- https://github.com/denoland/deno/commit/1ab2268c0bcbf9b0468e0e36963f77f8c31c73ec
- https://github.com/denoland/deno/releases/tag/v2.2.15
- https://github.com/denoland/deno/releases/tag/v2.5.3
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