Vulnerability Description
Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation and client-server communication. Prior to 1.4.26 , t.String({ format: 'url' }) is vulnerable to ReDoS. Repeating a partial url format (protocol and hostname) multiple times cause regex to slow down significantly. This vulnerability is fixed in 1.4.26.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Elysiajs | Elysia | < 1.4.26 |
Related Weaknesses (CWE)
References
- https://github.com/EdamAme-x/elysia-poc-redosExploit
- https://github.com/elysiajs/elysia/security/advisories/GHSA-f45g-68q3-5w8xMitigationVendor Advisory
FAQ
What is CVE-2026-30837?
CVE-2026-30837 is a vulnerability with a CVSS score of 7.5 (HIGH). Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation and client-server communication. Prior to 1.4.26 , t.String({ format: 'url' }) is vulnerable to ReDoS. Re...
How severe is CVE-2026-30837?
CVE-2026-30837 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30837?
Check the references section above for vendor advisories and patch information. Affected products include: Elysiajs Elysia.