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Low · 3.3 CVE-2025-61786 EUVD-2025-33180GHSA-qq26-84mh-26j9

Deno's --deny-read check does not prevent permission bypass

Published Oct 8, 2025 · Updated Oct 8, 2025 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
denoland deno >= 2.3.0, < 2.5.3, < 2.2.15 —

Affected packages

EcosystemPackageAffectedFixedRecord
crates.io deno < 2.5.3 2.5.3 GHSA-qq26-84mh-26j9

References