Disclosure summary
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.
Source-reported weakness categories
CWE-266
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-61785
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| deno | deno | * {"versionStartIncluding":"2.3.0","versionEndExcluding":"2.5.3"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Issue Tracking, Patch
- github.com — Release Notes
- github.com — Release Notes
- github.com — Exploit, Vendor Advisory
PUBLISHED 2025-10-07T21:15:32-04:00
MODIFIED 2026-10-08T09:10:00-04:00
INGESTED 2026-10-08T12:30:36-04:00