CVE-2026-30837

Elysia has a string URL format redos

State: Published
Severity: 7.5 High
Published: Mar 10, 2026
Updated: Mar 11, 2026
Reserved: Mar 5, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-1333 Inefficient Regular Expression Complexity

Affected Products

Product	Versions
elysiaelysiajs	< 1.4.26Affected

References

https://github.com/elysiajs/elysia/security/advisories/GHSA-f45g-68q3-5w8x
https://github.com/EdamAme-x/elysia-poc-redos

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