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

Read the record on cve.org

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

CVSSScoreVectorSource
3.13.3 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NGitHub_M

Weaknesses

  • CWE-269 Improper Privilege Management

Affected Products

ProductVersions
denodenoland
  • >= 2.3.0, < 2.5.3Affected
  • < 2.2.15Affected

References

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