CVE-2026-115897
CVE-2026-115897 · Serialize JavaScript: Cross-site scripting (XSS) via unescaped </script at the end of a serialized function body
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function source text ends exactly at that prefix. Because each function body is escaped independently, a delimiter supplied by surrounding serialized output can terminate an HTML script element, and a later serialized value supplies injected markup that becomes a live element in the page. Exploitation requires control of a serialized function's source text, such as through a spoofed toString(). This issue is fixed in version 7.1.3.
CVSS 2.1 · Low
- Published
- Updated
Affected products and versions
serialize-javascript
- Versions
- < 7.1.3: Affected
No fix published
Original sources
- https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v
- https://github.com/yahoo/serialize-javascript/pull/235
- https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61
- https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3
- https://nvd.nist.gov/vuln/detail/CVE-2026-115897