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OpenAdvisories
Critical · 9.0 CVE-2026-35198 EUVD-2026-45984

HeyForm vulnerable to stored XSS via form field titles

Published Jul 20, 2026 · Updated Aug 21, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
heyform heyform < 3.0.0-rc.7 —

References