CVE-2026-23956
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductLxsmnsyc Seroval
PublishedJan 22, 2026
First seenJan 22, 2026
Weakness typeCWE-1333CWE-1333
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 | 0.2.0 ≤ v < 1.4.1 | 1.4.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.