Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d
- 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
FAQ
What is CVE-2026-115897?
CVE-2026-115897 is a documented vulnerability. 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 c...
How severe is CVE-2026-115897?
CVSS scoring is not yet available for CVE-2026-115897. Check NVD for updates.
Is there a patch for CVE-2026-115897?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.