---
id: CVE-2025-61785
title: 'Deno is a JavaScript, TypeScript, and WebAssembly runtime'
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 p…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-266
vendor: deno
product: deno
affected:
  - deno <= 2.2.15
  - 'deno >= 2.3.0, < 2.5.3'
patched:
  - deno 2.5.3
published: '2025-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T13:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-61785'
references:
  - url: >-
      https://github.com/denoland/deno/commit/992e998dfe436cdc9325232759af8be92f11739b
    label: security-advisories@github.com
  - url: 'https://github.com/denoland/deno/pull/30872'
    label: security-advisories@github.com
  - url: 'https://github.com/denoland/deno/releases/tag/v2.2.15'
    label: security-advisories@github.com
  - url: 'https://github.com/denoland/deno/releases/tag/v2.5.3'
    label: security-advisories@github.com
  - url: 'https://github.com/denoland/deno/security/advisories/GHSA-vg2r-rmgp-cgqj'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.002
epssPercentile: 0.08986
ingestedAt: '2026-10-08T13:42:54.989Z'
---

## Overview

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.

## Affected

- `deno <= 2.2.15`
- `deno >= 2.3.0, < 2.5.3`

## Remediation

Upgrade past the affected range:

- `deno 2.5.3`