CVE-2026-35198 Details
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.
A stored cross-site scripting vulnerability has been identified in HeyForm, an open-source form builder, prior to version 3.0.0-rc.7. This vulnerability allows a low-privileged team member to inject malicious JavaScript into form field titles. The injected script executes when a team owner views the form, potentially leading to a complete account takeover by transferring team ownership to the attacker.
Users can update to HeyForm version 3.0.0-rc.7 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 20, 2026CISA-ADP
Assessed Jul 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwx | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/heyform/heyform/commit/cc97d27a57ae400fec23abf5dcf6f9533c3b5db3 | [email protected] | Source CodeVendor |
| https://github.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwx | [email protected] | AdvisoryExploitRemedyVendor |
| https://vokecyber.com/research/cve-2026-35198-heyform-stored-xss | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| HeyForm | <= 3.0.0-rc.6 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 21, 2026 | CVE Modified | [email protected] |
| Jul 20, 2026 | CVE Modified | CISA-ADP |
| Jul 20, 2026 | New CVE Received | [email protected] |