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CVE-2026-28445

8.7 · HIGH

Typebot is a chatbot builder tool.

Published May 22, 2026CWE-79EPSS 0.44%

Overview

CVE-2026-28445 is a high-severity vulnerability. It was published on May 22, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the RatingButton component in the embed package renders the user-controlled customIcon.svg field directly via Solid's innerHTML directive without any sanitization, even though DOMPurify is already a dependency and is used elsewhere in the codebase (e.g., StreamingBubble.tsx). Because rating blocks are not flagged as isUnsafe by the import sanitizer and the builder preview renders bots inline on the builder's own origin (builder.typebot.io) under a CSP permitting 'unsafe-inline', a malicious imported or collaborator-crafted typebot can execute arbitrary HTML/JS in the builder's authenticated context, bypassing the Web Worker sandbox that protects Script blocks during preview. This allows session hijacking and privilege escalation within the builder application. This issue has been fixed in version 3.16.0.

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/baptisteArno/typebot.io/commit/474ecbf46bc47a75265bada2599f12b2179de375GitHubgithub.com/baptisteArno/typebot.io/releases/tag/v3.16.0GitHubgithub.com/baptisteArno/typebot.io/security/advisories/GHSA-6m7c-xfhp-p9fhGitHubgithub.com/baptisteArno/typebot.io/security/advisories/GHSA-6m7c-xfhp-p9fh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-28445?

CVE-2026-28445 is a high-severity vulnerability. It was published on May 22, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-28445?

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-28445?

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-2026-28445?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28445 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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