Vulnerability Description
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.0.0 and from 1.5.5 until 1.6.10, the JavaScript-output APIs serialize a RegExp source containing a less-than character without the escaping needed for an HTML script element. An application is affected when it builds regular expression syntax from untrusted input, serializes that RegExp through serialize, serializeAsync, crossSerialize, crossSerializeAsync, crossSerializeStream, Serializer, or compileJSON, and embeds the result in an HTML script element. The crafted source can terminate the element and execute script in the page received by another user. This issue is fixed in version 1.6.10.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/lxsmnsyc/seroval/commit/f94ee0b63936dae954ff50d5b5e8ea7cb9b28
- https://github.com/lxsmnsyc/seroval/releases/tag/[email protected]
- https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-9wx9-5pv9-3349
FAQ
What is CVE-2026-116582?
CVE-2026-116582 is a vulnerability with a CVSS score of 4.7 (MEDIUM). Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.0.0 and from 1.5.5 until 1.6.10, the JavaScript-output APIs serialize ...
How severe is CVE-2026-116582?
CVE-2026-116582 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116582?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.