| Name | CVE-2026-13311 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1140921 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| node-shell-quote (PTS) | bookworm, bookworm (security) | 1.7.4+~1.7.1-1+deb12u1 | vulnerable |
| trixie (security), trixie | 1.7.4+~1.7.1-1+deb13u1 | vulnerable |
| forky, sid | 1.9.0+~1.7.5-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[trixie] - node-shell-quote <no-dsa> (Minor issue)
[bookworm] - node-shell-quote <postponed> (Minor issue; quadratic-complexity DoS in parse(), reachable only where a service parses attacker-supplied strings)
https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv
Fixed by: https://github.com/ljharb/shell-quote/commit/7ff5488599d01c323514f02f5efb74088dd134ec (v1.9.0)