Vulnerability Details CVE-2026-13311
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 27.9%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-13311
-
cpe:2.3:a:shell-quote_project:shell-quote:0.0.0
-
cpe:2.3:a:shell-quote_project:shell-quote:0.0.1
-
cpe:2.3:a:shell-quote_project:shell-quote:0.1.0
-
cpe:2.3:a:shell-quote_project:shell-quote:0.1.1
-
cpe:2.3:a:shell-quote_project:shell-quote:1.0.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.1.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.2.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.3.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.3.1
-
cpe:2.3:a:shell-quote_project:shell-quote:1.3.2
-
cpe:2.3:a:shell-quote_project:shell-quote:1.3.3
-
cpe:2.3:a:shell-quote_project:shell-quote:1.4.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.4.1
-
cpe:2.3:a:shell-quote_project:shell-quote:1.4.2
-
cpe:2.3:a:shell-quote_project:shell-quote:1.4.3
-
cpe:2.3:a:shell-quote_project:shell-quote:1.5.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.6.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.6.1
-
cpe:2.3:a:shell-quote_project:shell-quote:1.6.2
-
cpe:2.3:a:shell-quote_project:shell-quote:1.6.3
-
cpe:2.3:a:shell-quote_project:shell-quote:1.7.0
-
cpe:2.3:a:shell-quote_project:shell-quote:1.7.1
-
cpe:2.3:a:shell-quote_project:shell-quote:1.7.2