VULNERABILITY INTELLIGENCE
CVE-2026-35198
CVSS score9 CRITICAL
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-07-20
Last modified2026-08-21
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
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 classification
- security-advisories@github.com: CWE-79