CVE-2026-23957: Lxsmnsyc Seroval

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.

Affected products

• Lxsmnsyc Seroval: before 1.4.1 (fixed in 1.4.1)

Published 2026-01-22. Last modified 2026-06-17.