Deno 2.7.0 through 2.9.7 Command Injection via node:child_process

Advisories

Deno 2.7.0 through 2.9.7 Command Injection via node:child_process

severity: critical
date: 9/30/2026
Affecting: deno >= 2.7.0, <= 2.9.7
CVE: CVE-2026-103473
CWE: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS: 9.2
CVSS V4 Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: Pull Request #36772
https://github.com/denoland/deno
https://github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node/polyfills/internal/child_process.ts#L1499
https://github.com/denoland/deno/blob/0c071246a412575e07423263404a5d13e7ed6aa2/ext/node/polyfills/internal/child_process.ts#L1339
Credit: PVUDivakar
Description: Deno versions 2.7.0 through 2.9.7 on Windows contain a command injection vulnerability in node:child_process where shell arguments are escaped for the wrong shell type. Attackers can inject OS commands by passing untrusted arguments with the shell option, allowing arbitrary command execution with Deno process privileges.

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