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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-61786
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-08 01:15:33 UTC
Updated2026-10-08 13:10:00 UTC
DescriptionDeno 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.

Risk And Classification

Primary CVSS: v3.1 3.3 LOW from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.001950000 probability, percentile 0.084400000 (date 2026-10-08)

Problem Types: CWE-269 | CWE-269 CWE-269: Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Deno Deno All All All All
Application Deno Deno All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Denoland Deno affected >= 2.3.0, < 2.5.3 Not specified
CNA Denoland Deno affected < 2.2.15 Not specified

References

ReferenceSourceLinkTags
github.com/denoland/deno/pull/30876 [email protected] github.com Issue Tracking, Patch
github.com/denoland/deno/releases/tag/v2.2.15 [email protected] github.com Release Notes
github.com/denoland/deno/commit/1ab2268c0bcbf9b0468e0e36963f77f8c31c73ec [email protected] github.com Patch
github.com/denoland/deno/releases/tag/v2.5.3 [email protected] github.com Release Notes
github.com/denoland/deno/security/advisories/GHSA-qq26-84mh-26j9 [email protected] github.com Exploit, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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