CVE-2026-23737
7.5 · HIGHOverview
CVE-2026-23737 is a high-severity vulnerability affecting lxsmnsyc seroval. It was published on January 21, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0.
Remediation
Check the references section for vendor advisories and patches from lxsmnsyc. Update seroval to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| lxsmnsyc | seroval | >= 0, < 1.4.1 | Affected |
Frequently Asked Questions
What is CVE-2026-23737?
CVE-2026-23737 is a high-severity vulnerability affecting lxsmnsyc seroval. It was published on January 21, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-23737?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-23737?
Check the references section for vendor advisories and patches from lxsmnsyc. Update seroval to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-23737?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-23737 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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