VulnerabilityAnalyzed
CVE-2026-30837
Prior to 1.4.26 , t.String({ format: 'url' }) is vulnerable to ReDoS.
HIGH 7.5EPSS 0.49%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.49% probability · 41th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1333
- Affected
- elysiajs/elysia
- Source
- security-advisories@github.com
References
- https://github.com/EdamAme-x/elysia-poc-redosExploit
- https://github.com/elysiajs/elysia/security/advisories/GHSA-f45g-68q3-5w8xMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.