CVE-2026-30837 Details
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.
A regular expression denial-of-service (ReDoS) vulnerability has been identified in the Elysia framework, specifically in versions prior to 1.4.26. The issue arises in the string validation function when the 'url' format is used. The vulnerability can be exploited by repeating a partial URL format, including the protocol and hostname, which causes significant slowdowns in regex processing. This issue has been addressed in version 1.4.26.
Users are advised to update the Elysia framework to version 1.4.26 or later. If an immediate update is not possible, a workaround is to limit the URL format to a reasonable length or to manually patch the URL format validation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/EdamAme-x/elysia-poc-redos | [email protected] | Exploit |
| https://github.com/elysiajs/elysia/security/advisories/GHSA-f45g-68q3-5w8x | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1333 | Inefficient Regular Expression Complexity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| elysiajs elysia | < 1.4.26 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 20, 2026 | Initial Analysis | [email protected] |
| Mar 10, 2026 | New CVE Received | [email protected] |