Elysia: Inefficient Algorithmic Complexity and Interpretation Conflict

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Summary

CVECVE-2026-56669
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 21:16:50 UTC
Updated2026-07-08 21:16:50 UTC
DescriptionElysia 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-407 | CWE-436 | CWE-407 CWE-407: Inefficient Algorithmic Complexity | CWE-436 CWE-436: Interpretation Conflict

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Elysiajs Elysia affected < 1.4.29 Not specified

References

ReferenceSourceLinkTags
gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9 [email protected] gist.github.com
github.com/elysiajs/elysia/releases/tag/1.4.29 [email protected] github.com
github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329 [email protected] github.com
github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx [email protected] github.com
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