CVE-2025-61785CWE-266

CVE-2025-61785

Low · published October 8, 2025

CVSS v3.1
3.3
EPSS
0%
Percentile
9.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.3 · LOW
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00200 · 9.3th percentile
Weakness
CWE-266 · Incorrect Privilege Assignment
Published
2025-10-08T05:15Z
Affected products (2)
ProductVersionsFixed in
deno/deno≤ 2.2.15—
deno/deno≥ 2.3.0, < 2.5.32.5.3
References (5)
EPSS history
Timeline
  • 08 OCT 00:37Z
    Deno's --deny-write check does not prevent permission bypass
    cvelistv5