denoland deno up to 2.7.1 Double Quote child_process.ts child_process os command injection

Summaryinfo

A vulnerability classified as critical was found in denoland deno up to 2.7.1. This affects the function child_process of the file ext/node/polyfills/internal/child_process.ts of the component Double Quote Handler. Executing a manipulation can lead to os command injection. This vulnerability is registered as CVE-2026-32260. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in denoland deno up to 2.7.1 and classified as critical. This vulnerability affects the function child_process of the file ext/node/polyfills/internal/child_process.ts of the component Double Quote Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.7.0 to 2.7.1, A command injection vulnerability exists in Deno's node:child_process polyfill (shell: true mode) that bypasses the fix for CVE-2026-27190. The two-stage argument sanitization in transformDenoShellCommand (ext/node/polyfills/internal/child_process.ts) has a priority bug: when an argument contains a $VAR pattern, it is wrapped in double quotes (L1290) instead of single quotes. Double quotes in POSIX sh do not suppress backtick command substitution, allowing injected commands to execute. An attacker who controls arguments passed to spawnSync or spawn with shell: true can execute arbitrary OS commands, bypassing Deno's permission system. This vulnerability is fixed in 2.7.2.

The advisory is available at github.com. This vulnerability was named CVE-2026-32260 since 03/11/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 2.7.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202603-2478). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• denoland

Name

• deno

Version

• 2.7.0
• 2.7.1

Website

• Product: https://github.com/denoland/deno/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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