PT-2026-52200 · Ljharb · Shell-Quote

Bibu123456 + 2 · Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-13311

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Weakness Enumeration

CWE-407

Related Identifiers

CVE-2026-13311

Affected Products

Shell-Quote

References · 3

• https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-13311 · Security Note
• https://npmjs.com/package/shell-quote · Note