Medium 4.7Published Oct 23, 2026

CVE-2026-115754serialize-javascript 7.0.1 before 7.1.3 XSS via unescaped </script in function body

Updated under an hour ago (Oct 27, 2026, 2:50 PM ET)

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It affects yahoo serialize-javascript. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for yahoo serialize-javascript

Exploited in the last 30 days

serialize-javascript from 7.0.1 before 7.1.3 contains a cross-site scripting vulnerability that allows attackers to break out of HTML script elements by ending serialized function source text with an unescaped </script. Attackers controlling a function's source via a spoofed toString() can combine surrounding output delimiters and later values to inject live markup such as img onerror handlers.

CVSS: 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

yahoo serialize-javascript yahoo:serialize_javascript (from the name)	from 7.0.1 before 7.1.3	CNA record

References

References

https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v	vendor-advisory
https://github.com/yahoo/serialize-javascript/pull/235	patch, issue-tracking
https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61	patch
https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3	release-notes
https://www.vulncheck.com/advisories/serialize-javascript-7.0.1-before-7.1.3-xss-via-unescaped-script-in-function-body	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.