CVE-2026-56669 | Elysia is a Typescript framework for request validation, typ… | CVSS 7.5 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-56669
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-22 16:39 UTC
Published: 2026-07-08 20:25 UTC
Last updated: 2026-07-08 20:25 UTC
Primary CWE: CWE-407
CWE-407: Inefficient Algorithmic Complexity
Vendor / Product: elysiajs / elysia
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products (1)

Vendor	Product	Platform	Versions
elysiajs	elysia	—	< 1.4.29

Weakness (CWE)

CWE	Source	Description
CWE-407	cna	CWE-407: Inefficient Algorithmic Complexity
CWE-436	cna	CWE-436: Interpretation Conflict

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (4)

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