CVE-2026-115754

CVSS 4.7 (medium) · published 2026-10-23

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.

Weakness: CWE-79

Source: NVD CVE-2026-115754

References

• https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61
• https://github.com/yahoo/serialize-javascript/pull/235
• https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3
• https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v
• https://www.vulncheck.com/advisories/serialize-javascript-7.0.1-before-7.1.3-xss-via-unescaped-script-in-function-body

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