CVE-2026-35198
CRITICAL9.0CVSS v3
—CVSS v2
0.23%
EPSS (exploit probability)
CWE-79CWE
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.
CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Affected routers (0)
No routers currently mapped to this CVE in our database.