CVE-2026-22864

Published: Jan 15, 2026Modified: Jun 17, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.5.6, a prior patch aimed to block spawning Windows batch/shell files by returning an error when a spawned path’s extension matched .bat or .cmd. That check performs a case-sensitive comparison against lowercase literals and therefore can be bypassed when the extension uses alternate casing (for example .BAT, .Bat, etc.). This vulnerability is fixed in 2.5.6.

Affected (1)

Products: Deno: Deno

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Deno Deno	Before 2.5.6

Related CWEs

Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

References (2)

https://github.com/denoland/deno/releases/tag/v2.5.6

Source: security-advisories@github.com

Release Notes

https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.