CVE-2026-22864

πŸ”΄ HIGH

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 ....

Published
Jan 15, 2026
Last Modified
Jan 21, 2026
Views
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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 Products (1)

deno - deno

Version: *

CVSS Scores

CVSS 3.1 8.1
8.1
HIGH
CVSS 2.0 8.1

Additional Information

Source
security-advisories@github.com
State
Analyzed

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