CVE-2013-4660

NONECVSS 0.0Weaponized

0.0

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.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 98.5%
KEV: Not listed

Published

June 28, 2013

Last Modified

April 29, 2026

References (4)

cve@mitrehttp://portal.nodesecurity.io/advisories/js-yaml
cve@mitrehttps://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/
af854a3a-2127-422b-91ae-364da2661108http://portal.nodesecurity.io/advisories/js-yaml
af854a3a-2127-422b-91ae-364da2661108https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
js-yaml	—	2.0.5	—

Data Freshness Timeline

(refreshed 7× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 23:29 UTCEG score recompute
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:39 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-28655✓ verified
First seen Sep 30, 2013
Nodejs - 'js-yaml load()' Code Exec (Metasploit)
Open source ↗
Metasploitexploit/multi/fileformat/nodejs_js_yaml_load_code_exec✓ verified
First seen Jun 28, 2013
Nodejs js-yaml load() Code Execution
Open source ↗

Frequently asked(4)

What is CVE-2013-4660?

CVE-2013-4660 is a none vulnerability published on June 28, 2013. 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.

When was CVE-2013-4660 disclosed?

CVE-2013-4660 was first published in the National Vulnerability Database on June 28, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2013-4660 actively exploited?

CVE-2013-4660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2013-4660?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-4660, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2013-4660

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