CVE-2026-23736: Lxsmnsyc Seroval

Critical severity, CVSS 9.8. EPSS: 0.3% 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, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.

Affected products

• Lxsmnsyc Seroval: before 1.4.1 (fixed in 1.4.1)

Published 2026-01-21. Last modified 2026-06-17.