VULNERABILITY INTELLIGENCE

CVE-2026-31865

CVSS score6.5 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-03-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Description

Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to version 1.4.27, an Elysia cookie can be overridden by prototype pollution , eg. `__proto__`. This issue is patched in 1.4.27. As a workaround, use t.Cookie validation to enforce validation value and/or prevent iterable over cookie if possible.

Weakness classification

  • security-advisories@github.com: CWE-1321

Primary references