CVE-2026-35198

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CVSS 3.1

9.0 critical

EPSS

<1%p41

Published

Jul 20, 2026 (Jul 20, 2026)

Modified

Aug 21, 2026

Description

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.7, a stored cross-site scripting (XSS) vulnerability in the form builder allows a low-privileged team member to inject malicious JavaScript that executes when a team owner views the form, leading to complete account takeover through privilege escalation. Version 3.0.0-rc.7 contains a patch for the issue.

Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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