CVE-2026-30837: high-severity vulnerability in elysiajs elysia
Elysia has a string URL format redos
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
elysiajs · elysiaRelated CVEs — elysiajs elysia
In the same product, most dangerous first.
CVE-2025-66457HIGHElysia affected by arbitrary code injection through cookie configEPSS 0.9%CVE-2026-56669HIGHElysia: Inefficient Algorithmic Complexity and Interpretation ConflictEPSS 0.6%CVE-2025-66456CRITICALElysia vulnerable to prototype pollution with multiple standalone schema validationEPSS 0.6%CVE-2026-31865MEDIUMElysia Cookie Value Prototype PollutionEPSS 0.2%