cvedb.io
CVE-2026-31865
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2026-03-18T04:17:19.393 · Last modified 2026-06-17T10:34:39.547

Summary

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.

Affected products

elysiajs — elysia

Does this affect you?

Add your gear to cvedb and we'll alert you only when elysiajs ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.