CVE-2026-23736
High
Description
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.
SeverityHigh
CVSS7.3
Exploit probability—
ProductLxsmnsyc Seroval
PublishedJan 21, 2026
First seenJan 21, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Update
- lxsmnsyc seroval1.4.1 or later
- seroval1.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| lxsmnsyc seroval | v < 1.4.1 | 1.4.1 |
| serovalnpm | v < 1.4.1 | 1.4.1 |
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