CVE-2026-56669

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Elysia es un framework de Typescript para validación de solicitudes, inferencia de tipos, documentación OpenAPI y comunicación cliente-servidor. Antes de la versión 1.4.29, Elysia utiliza getAll en la normalización de datos de formulario para endpoints multipart/form-data, lo que provoca que la cantidad de trabajo crezca cuadráticamente con el número de pares clave-valor únicos y permite el agotamiento de la CPU. Este problema está solucionado en la versión 1.4.29.

Information

Published : 2026-07-08 21:16

Updated : 2026-10-25 17:10

NVD link : CVE-2026-56669

Mitre link : CVE-2026-56669

CVE.ORG link : CVE-2026-56669

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

CWE-436

Interpretation Conflict

{"id": "CVE-2026-56669", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56669", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-10T15:01:58.719561Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "elysiajs", "product": "elysia", "versions": [{"status": "affected", "version": "< 1.4.29"}]}]}], "published": "2026-07-08T21:16:50.690", "references": [{"url": "https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9", "source": "security-advisories@github.com"}, {"url": "https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329", "source": "security-advisories@github.com"}, {"url": "https://github.com/elysiajs/elysia/releases/tag/1.4.29", "source": "security-advisories@github.com"}, {"url": "https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-407"}, {"lang": "en", "value": "CWE-436"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Elysia es un framework de Typescript para validaci\u00f3n de solicitudes, inferencia de tipos, documentaci\u00f3n OpenAPI y comunicaci\u00f3n cliente-servidor. Antes de la versi\u00f3n 1.4.29, Elysia utiliza getAll en la normalizaci\u00f3n de datos de formulario para endpoints multipart/form-data, lo que provoca que la cantidad de trabajo crezca cuadr\u00e1ticamente con el n\u00famero de pares clave-valor \u00fanicos y permite el agotamiento de la CPU. Este problema est\u00e1 solucionado en la versi\u00f3n 1.4.29."}], "lastModified": "2026-10-25T17:10:00.197", "sourceIdentifier": "security-advisories@github.com"}