CVE-2026-30837

HIGH

Elysia < 1.4.26 - Inefficient Regular Expression Complexity in URL Format Validation

Title source: llm

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.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_confirm

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

Various Sources x_refsource_misc

https://github.com/EdamAme-x/elysia-poc-redos

View Writeup ZIP pw:eip

Scores

CVSS v3 7.5

EPSS 0.0049

EPSS Percentile 38.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-1333

Status published

Products (1)

elysiajs/elysia < 1.4.26

Published Mar 10, 2026

Tracked Since Mar 11, 2026