---
id: CVE-2026-115754
title: >-
  serialize-javascript 7.0.1 before 7.1.3 XSS via unescaped </script in function
  body
summary: >-
  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
  control…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: yahoo
product: serialize-javascript
affected:
  - serialize-javascript >= 7.0.1 < 7.1.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-23T14:48:53.139109Z'
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T14:58:11.402Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115754'
references:
  - url: >-
      https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v
    label: GitHub Security Advisory (GHSA-m5mm-p8h7-m29v)
  - url: 'https://github.com/yahoo/serialize-javascript/pull/235'
  - url: >-
      https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61
  - url: 'https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3'
    label: serialize-javascript v7.1.3 Release Notes
  - url: >-
      https://www.vulncheck.com/advisories/serialize-javascript-7.0.1-before-7.1.3-xss-via-unescaped-script-in-function-body
    label: >-
      VulnCheck Advisory: serialize-javascript 7.0.1 before 7.1.3 XSS via
      unescaped </script in function body
tags:
  - cve.org
ingestedAt: '2026-10-23T14:28:08.714Z'
---

## Overview

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.

## Affected

- `serialize-javascript >= 7.0.1 < 7.1.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.