CVE-2026-56669 HIGH

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

Vendor Elysiajs

Product elysia

Weakness CWE-407

Published July 8, 2026

Last update July 10, 2026

View on NVD All CVEs

CVSS base score

7.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality None

Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 8, 2026 CVE published

July 10, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-56669 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/407.html AskarLabs — CWE-407 write-up Inefficient Algorithmic Complexity