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CVE-2026-30837

Elysiajs Elysia vulnerability

7.5 HIGHPublic exploitEPSS 0.53%
  1. Published10 Mar 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Elysiajs Elysia< 1.4.26

Remediation

Fixed in
Elysiajs Elysia≥ 1.4.26

References

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Frequently asked

Is CVE-2026-30837 being actively exploited?

CVE-2026-30837 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.53%.

How severe is CVE-2026-30837?

CVE-2026-30837 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2026-30837?

Affected products include Elysiajs Elysia.

How do I fix CVE-2026-30837?

Upgrade affected software to a fixed version, for example Elysiajs Elysia 1.4.26 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-30837 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.