CVE Catalog

CVE-2026-28445

HighCVSS 8.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

17th percentile - higher than 17% of all known CVEs

Summary

Typebot versions 3.15.2 and earlier have an HTML/JS injection vulnerability in the RatingButton component, which renders the customIcon.svg field via innerHTML without sanitization. An attacker can inject malicious code that executes in the context of an authenticated user in the builder panel, bypassing the Web Worker sandbox.

Risk Assessment

An attacker can hijack sessions and escalate privileges within the builder application, potentially leading to account takeover and data theft.

Recommendation

Update Typebot to version 3.16.0, which includes a fix for this vulnerability.

Other vulnerabilities in Typebot

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS