CVE-2026-22864: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in denoland deno
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.
CVE-2026-22864: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in denoland deno
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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-01-12T16:20:16.746Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 696974917c726673b685514b
Added to database: 1/15/2026, 11:13:21 PM
Last updated: 1/15/2026, 11:13:31 PM
Views: 1
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CriticalActions
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