CVE-2026-30837

HIGH
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
PoC Detected
Mar 20, 2026 - 15:23 vuln.today
Public exploit code
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 10, 2026 - 21:16 nvd
HIGH 7.5

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.

Analysis

OpenAPI documentation and client-server communication. versions up to 1.4.26 is affected by inefficient regular expression complexity (redos) (CVSS 7.5).

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Remediation

Within 24 hours: Identify and inventory all systems running affected OpenAPI versions up to 1.4.26 and assess exposure to untrusted input. Within 7 days: Implement compensating controls including WAF rules to detect malicious regex patterns, enable request rate limiting, and apply network segmentation to limit exposure. …

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Priority Score

58
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: +20

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CVE-2026-30837 vulnerability details – vuln.today

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