CVE-2026-35198

critical · 9

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

0.5%

EPSS (exploit prob.)

41st

EPSS percentile

2026-07-20

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-79

References

https://github.com/heyform/heyform/commit/cc97d27a57ae400fec23abf5dcf6f9533c3b5db3
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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-35198