CVE-2026-23737
Last modified
CVE-2026-23737 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lxsmnsyc | Seroval | < 1.4.1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-23737?
How severe is CVE-2026-23737?
How do I fix CVE-2026-23737?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-23731WeGIA is a web manager for charitable institutions. Prior to…4.3
- CVE-2026-23732FreeRDP is a free implementation of the Remote Desktop Proto…7.5
- CVE-2026-23733LobeChat is an open source chat application platform. Prior …6.4
- CVE-2026-23734XWiki Platform is a generic wiki platform. Versions prior to…9.3
- CVE-2026-23735GraphQL Modules is a toolset of libraries and guidelines ded…8.7
- CVE-2026-23736seroval facilitates JS value stringification, including comp…9.8
- CVE-2026-23738Asterisk is an open source private branch exchange and telep…6.1
- CVE-2026-23739Asterisk is an open source private branch exchange and telep…6.5
- CVE-2026-2374The Login No Captcha reCAPTCHA plugin for WordPress is vulne…7.2
- CVE-2026-23740Asterisk is an open source private branch exchange and telep…7.8
- CVE-2026-23741Asterisk is an open source private branch exchange and telep…8.8
- CVE-2026-23742Skipper is an HTTP router and reverse proxy for service comp…8.8
Are you affected by CVE-2026-23737?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST