CVE-2026-49402: Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implementation provided an escapeShellArg() helper used…

PriorityP350high8.1CVSS 3.1

AVNACHPRNUINSUCHIHAH

EPSS

0.45%

38.0th percentile

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implementation provided an escapeShellArg() helper used when callers passed shell: true to spawn / spawnSync / exec and friends. On Windows, the helper failed to quote arguments that contained cmd.exe metacharacters and did not neutralize % (which cmd.exe expands even inside double-quoted strings). An attacker who controlled any portion of an argument passed to such a call could inject arbitrary additional commands into the spawned cmd.exe invocation. This vulnerability is fixed in 2.7.10.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
deno	deno	< 2.7.10	2.7.10
deno	deno	>= 0 < 2.7.10	2.7.10
denoland	deno	< 2.7.10	2.7.10

CVSS provenance

nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

ghsa9.8CRITICAL

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