CVE-2026-23956: Lxsmnsyc Seroval

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). 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.