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Vulnerability record · CVE-2013-4660 · published 28 June 2013

CVE-2013-4660: Nodeca js-yaml improper input validation vulnerability

Nodeca · Js Yaml

The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, which allows remote attackers to execute arbitrary code via a crafted string that triggers an eval operation.

6.8 CVSS 2.0 Medium EPSS 17% · top 3.0% CWE-20 · Improper input validation
6.8CVSS 2.0 base score
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, which allows remote attackers to execute arbitrary code via a crafted string that triggers an eval operation.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://portal.nodesecurity.io/advisories/js-yaml Vendor Advisory
https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/ ExploitVendor Advisory
http://portal.nodesecurity.io/advisories/js-yaml Vendor Advisory
https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/ ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2013-4660), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.