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Permalink CVE-2026-22864
8.1 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
updated 4 months, 1 week ago by @LeSuisse Activity log
  • Created suggestion
  • @LeSuisse ignored
    12 packages
    • speech-denoiser
    • openimagedenoise
    • terraform-providers.deno
    • python312Packages.denonavr
    • python313Packages.denonavr
    • haskellPackages.pandoc-sidenote
    • terraform-providers.denoland_deno
    • gnomeExtensions.denon-avr-controler
    • python312Packages.bnunicodenormalizer
    • python313Packages.bnunicodenormalizer
    • vscode-extensions.denoland.vscode-deno
    • home-assistant-component-tests.denonavr
  • @LeSuisse dismissed
Deno has an incomplete fix for command-injection prevention on Windows — case-insensitive extension bypass

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

deno
  • ==< 2.5.6

Matching in nixpkgs

pkgs.deno

Secure runtime for JavaScript and TypeScript

Ignored packages (12)

Package maintainers

No Windows support