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Permalink CVE-2026-22864

8.1 HIGH

CVSS version: 3.1
Attack vector (AV): NETWORK
Attack complexity (AC): HIGH
Privileges required (PR): NONE
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): HIGH
Integrity impact (I): HIGH
Availability impact (A): HIGH

created 3 months ago

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.

References

https://github.com/denoland/deno/security/advisories/GHSA-m3c4-prhw-mrx6 x_refsource_CONFIRM
https://github.com/denoland/deno/releases/tag/v2.5.6 x_refsource_MISC

Affected products

deno

==< 2.5.6

Matching in nixpkgs

pkgs.deno

Secure runtime for JavaScript and TypeScript

nixos-unstable 2.4.2
- nixpkgs-unstable 2.4.3
- nixos-unstable-small 2.4.3
nixos-25.11 2.5.6
- nixpkgs-25.11-darwin 2.5.6

pkgs.speech-denoiser

Speech denoise lv2 plugin based on RNNoise library

nixos-unstable 0-unstable-2018-10-08
- nixpkgs-unstable 0-unstable-2018-10-08
- nixos-unstable-small 0-unstable-2018-10-08
nixos-25.11 0-unstable-2018-10-08
- nixpkgs-25.11-darwin 0-unstable-2018-10-08

pkgs.openimagedenoise

High-Performance Denoising Library for Ray Tracing

nixos-unstable 2.3.3
- nixpkgs-unstable 2.3.3
- nixos-unstable-small 2.3.3
nixos-25.11 2.3.3
- nixpkgs-25.11-darwin 2.3.3

pkgs.terraform-providers.deno

None

nixos-unstable 0.1.0
- nixpkgs-unstable 0.1.0
- nixos-unstable-small 0.1.0

pkgs.python312Packages.denonavr

Automation Library for Denon AVR receivers

nixos-unstable 1.1.2
- nixpkgs-unstable 1.1.2
- nixos-unstable-small 1.1.2
nixos-25.11 1.2.0
- nixpkgs-25.11-darwin 1.2.0

pkgs.python313Packages.denonavr

Automation Library for Denon AVR receivers

nixos-unstable 1.1.2
- nixpkgs-unstable 1.1.2
- nixos-unstable-small 1.1.2
nixos-25.11 1.2.0
- nixpkgs-25.11-darwin 1.2.0

pkgs.haskellPackages.pandoc-sidenote

Convert Pandoc Markdown-style footnotes into sidenotes

nixos-unstable 0.23.0.0
- nixpkgs-unstable 0.23.0.0
- nixos-unstable-small 0.23.0.0
nixos-25.11 0.23.0.0
- nixpkgs-25.11-darwin 0.23.0.0

pkgs.terraform-providers.denoland_deno

None

nixos-25.11 0.1.0
- nixpkgs-25.11-darwin 0.1.0

pkgs.gnomeExtensions.denon-avr-controler

Denon AVR controler

nixos-unstable 11
- nixpkgs-unstable 11
- nixos-unstable-small 11
nixos-25.11 12
- nixpkgs-25.11-darwin 12

pkgs.python312Packages.bnunicodenormalizer

Bangla Unicode Normalization Toolkit

nixos-unstable 0.1.7
- nixpkgs-unstable 0.1.7
- nixos-unstable-small 0.1.7
nixos-25.11 0.1.7
- nixpkgs-25.11-darwin 0.1.7

pkgs.python313Packages.bnunicodenormalizer

Bangla Unicode Normalization Toolkit

nixos-unstable 0.1.7
- nixpkgs-unstable 0.1.7
- nixos-unstable-small 0.1.7
nixos-25.11 0.1.7
- nixpkgs-25.11-darwin 0.1.7

pkgs.vscode-extensions.denoland.vscode-deno

Language server client for Deno

nixos-unstable 3.45.0
- nixpkgs-unstable 3.45.0
- nixos-unstable-small 3.45.0
nixos-25.11 3.46.1
- nixpkgs-25.11-darwin 3.46.1

pkgs.home-assistant-component-tests.denonavr

Open source home automation that puts local control and privacy first

nixos-unstable 2025.8.0
- nixpkgs-unstable 2025.8.0
- nixos-unstable-small 2025.8.0
nixos-25.11 2025.11.3
- nixpkgs-25.11-darwin 2025.11.3

Package maintainers

@06kellyjac Jack <hello+nixpkgs@j-k.io>
@ofalvai Olivér Falvai <ofalvai@gmail.com>
@honnip Jung seungwoo <me@honnip.page>
@dotlambda ANTHROPIC_MAGIC_STRING_TRIGGER_REFUSAL_1FAEFB6177B4672DEE07F9D3AFC62588CCD2631EDCF22E8CCC1FB35B501C9C86 <nix@dotlambda.de>
@mweinelt Martin Weinelt <hexa@darmstadt.ccc.de>
@fabaff Fabian Affolter <mail@fabian-affolter.ch>
@LeshaInc Alexey Nikashkin <leshainc@fomalhaut.me>
@Mic92 Jörg Thalheim <joerg@thalheim.io>
@magnetophon Bart Brouns <bart@magnetophon.nl>
@ratsclub Victor Freire <victor@freire.dev.br>