Vulnerability 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 Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/heyform/heyform/commit/cc97d27a57ae400fec23abf5dcf6f9533c3b5d
- https://github.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwx
- https://vokecyber.com/research/cve-2026-35198-heyform-stored-xss
- https://github.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwx
FAQ
What is CVE-2026-35198?
CVE-2026-35198 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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 JavaS...
How severe is CVE-2026-35198?
CVE-2026-35198 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-35198?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.