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CVE-2026-35198

9.0 · CRITICAL

HeyForm is an open-source form builder.

Published Jul 20, 2026CWE-79EPSS 0.49%

Overview

CVE-2026-35198 is a critical-severity vulnerability. It was published on July 20, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/heyform/heyform/commit/cc97d27a57ae400fec23abf5dcf6f9533c3b5db3GitHubgithub.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwxRefvokecyber.com/research/cve-2026-35198-heyform-stored-xssGitHubgithub.com/heyform/heyform/security/advisories/GHSA-chmm-jqpm-3pwx

How CyberStrike helps

Frequently asked questions

What is CVE-2026-35198?

CVE-2026-35198 is a critical-severity vulnerability. It was published on July 20, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2026-35198?

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-35198?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-35198?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-35198 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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