CVE-2026-13311

The record

shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.

Affected packages

Related vulnerabilities

• CVE-2026-53550 js-yaml is a JavaScript YAML parser and dumper. Also affects python-pytest-html
• CVE-2026-48779 ws is an open source WebSocket client and server for Node.js. Also affects heroic-games-launcher
• CVE-2026-34601 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and… Also affects heroic-games-launcher
• CVE-2026-33036 fast-xml-parser allows users to process XML from JS object without C/C++ based libraries… Also affects heroic-games-launcher
• CVE-2026-28292 `simple-git`, an interface for running git commands in any node.js application, has an… Also affects heroic-games-launcher
• CVE-2026-3449 Versions of the package @tootallnate/once before 3.0.1 are vulnerable to Incorrect… Also affects heroic-games-launcher
• CVE-2026-27606 Rollup is a module bundler for JavaScript. Also affects heroic-games-launcher
• CVE-2026-26278 fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from… Also affects heroic-games-launcher