Cloudanix VulnDB

CVE-2026-44483

High · 8.2

CVSS

8.2

EPSS

0.5%

Published

May 27, 2026

CISA due date

—

The record

RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not block the keys __proto__, constructor, or prototype when walking a path. Because field names in submitted form data are passed directly to setPath via preprocessFormData (and through parseFormData / validate), an attacker who can submit a form to a Remix / React Router app using the library can set arbitrary properties on Object.prototype of the running server process. This is a default-reachable prototype pollution primitive: no special configuration is required. Any endpoint that accepts a form via parseFormData or runs a validator created with createValidator is affected. This vulnerability is fixed in 6.0.4 and 7.0.2.

Affected packages

Ecosystem Package Introduced Fixed
npm @rvf/set-get 6.0.0 6.0.4
npm @rvf/set-get 7.0.0 7.0.2

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