Read the docs
TI-2026-21627 Aliases CVE-2026-27190GHSA-hmh4-3xvx-q5hr

Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process

Priority HIGH 76CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.6.8, a command injection vulnerability exists in Deno's node:child_process implementation. This vulnerability is fixed in 2.6.8.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0246 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed deno (denoland): 2.6.8deno (crates.io): 2.6.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
denolanddenobefore 2.6.82.6.8Patch availableCNA
—deno (crates.io)before 2.6.82.6.8Patch availableGHSA-hmh4-3xvx-q5hr
  • deno Vendordenoland Affected before 2.6.8 Fixed in 2.6.8 Patch available CNA
  • deno (crates.io) Vendor— Affected before 2.6.8 Fixed in 2.6.8 Patch available GHSA-hmh4-3xvx-q5hr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*before 2.6.8Vulnerabledenoland
  • cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:* Versions before 2.6.8 Vulnerable ·denoland

Remediation

  • Fix · CNA deno (denoland) Fixed in 2.6.8
  • Fix · GHSA-hmh4-3xvx-q5hr deno (crates.io) Fixed in 2.6.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27190
  2. 2026-10-03 Alias added: GHSA-hmh4-3xvx-q5hr

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • 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
  • TI-2024-18539 Deno interactive permission prompt spoofing via improper ANSI stripping CVSS 3.1HIGH 8.8
See all 37 →

Sources

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