CVE-2026-44483— RVF: Prototype pollution in @rvf/set-get reachable via @rvf/core preprocessFormData (HTTP form data)
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44483
Vulnerability Information
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Vulnerability Title
RVF: Prototype pollution in @rvf/set-get reachable via @rvf/core preprocessFormData (HTTP form data)
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44483
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Vendor Advisories for CVE-2026-44483 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-44483
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