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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv	Vendor Advisory
https://www.npmjs.com/package/shell-quote	Product
https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:shell-quote_project:shell-quote:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-06-25 05:16

Updated : 2026-06-26 19:03

NVD link : CVE-2026-13311

Mitre link : CVE-2026-13311

CVE.ORG link : CVE-2026-13311

JSON object : View

Products Affected

shell-quote_project

shell-quote

CWE

CWE-407

Inefficient Algorithmic Complexity

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