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TI-2025-38179 Aliases CVE-2025-61786GHSA-qq26-84mh-26j9

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

Priority LOW 15CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-269.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed deno (denoland): 2.5.3, 2.2.15deno (crates.io): 2.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
denolanddeno2.3.0 to before 2.5.3; before 2.2.152.5.3, 2.2.15Patch availableCNA
—deno (crates.io)before 2.5.32.5.3Patch availableGHSA-qq26-84mh-26j9
  • deno Vendordenoland Affected 2.3.0 to before 2.5.3; before 2.2.15 Fixed in 2.5.3, 2.2.15 Patch available CNA
  • deno (crates.io) Vendor— Affected before 2.5.3 Fixed in 2.5.3 Patch available GHSA-qq26-84mh-26j9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*up to 2.2.15; 2.3.0 to before 2.5.3Vulnerabledenoland
  • cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:* Versions up to 2.2.15; 2.3.0 to before 2.5.3 Vulnerable ·denoland

Remediation

  • Fix · CNA deno (denoland) Fixed in 2.5.3, 2.2.15
  • Fix · GHSA-qq26-84mh-26j9 deno (crates.io) Fixed in 2.5.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-61786
  2. 2026-10-03 Alias added: GHSA-qq26-84mh-26j9

References

Exploit 1

Patch 2

Advisory 1

Other 3

  • TI-2026-21627 Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process CVSS 3.1CRITICAL 9.8
  • TI-2025-17782 Deno's AES GCM authentication tags are not verified CVSS 4.0HIGH 7.7
  • TI-2024-18537 *const c_void / ExternalPointer unsoundness leading to use-after-free CVSS 3.1HIGH 8.8
  • TI-2024-18536 Deno arbitrary file descriptor close via `op_node_ipc_pipe()` leading to permission prompt bypass CVSS 3.1HIGH 8.8
  • TI-2023-12990 Deno is vulnerable to interactive `run` permission prompt spoofing via improper ANSI neutralization CVSS 3.1HIGH 8.8
  • TI-2023-11328 Regular expression denial of service in deno CVSS 3.1HIGH 7.5
See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences