{"cve":"CVE-2026-28445","nvd":{"published":"2026-05-22T17:16:46.127","modified":"2026-07-23T16:10:00.137","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","score":8.7},"cwes":["CWE-79"],"references":["https://github.com/baptisteArno/typebot.io/commit/474ecbf46bc47a75265bada2599f12b2179de375","https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0","https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-6m7c-xfhp-p9fh","https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-6m7c-xfhp-p9fh"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-28445","score":0.00257,"percentile":0.17366,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6m7c-xfhp-p9fh","url":"https://osv.dev/vulnerability/GHSA-6m7c-xfhp-p9fh","summary":"Typebot has Stored XSS via Rating Block Custom Icon that Bypasses isUnsafe Sandbox in Builder Preview","modified":"2026-09-10T03:50:45.799215902Z","packages":[{"ecosystem":"npm","name":"@typebot.io/js","purl":"pkg:npm/%40typebot.io/js","ranges":["<0.10.1"],"fixed":["0.10.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}