High 7.5Published Jul 8, 2026

CVE-2026-56669Elysia: Inefficient Algorithmic Complexity and Interpretation Conflict

Updated under an hour ago (Oct 27, 2026, 9:40 PM ET)

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Every CVE for elysiajs elysia

Exploited in the last 30 days

Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of unique key-value pairs and allowing CPU exhaustion. This issue is fixed in version 1.4.29.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-407, CWE-436
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

elysiajs elysia elysiajs:elysia (from the name)	before 1.4.29	CNA record

References

References

https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx	x-refsource-confirm
https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329	x-refsource-misc
https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9	x-refsource-misc
https://github.com/elysiajs/elysia/releases/tag/1.4.29	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.