{"id":"CVE-2026-26862","details":"CleverTap Web SDK version 1.15.2 and earlier is vulnerable to DOM-based Cross-Site Scripting (XSS) via window.postMessage in the Visual Builder module. The origin validation in src/modules/visualBuilder/pageBuilder.js (lines 56-60) uses the includes() method to verify the originUrl contains \"dashboard.clevertap.com\", which can be bypassed by an attacker using a crafted subdomain","aliases":["GHSA-jfrq-hj9f-c8qx"],"modified":"2026-03-13T04:11:42.009946Z","published":"2026-02-27T18:16:12.163Z","references":[{"type":"WEB","url":"https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60"},{"type":"REPORT","url":"https://github.com/CleverTap/clevertap-web-sdk/issues/442"},{"type":"FIX","url":"https://github.com/CleverTap/clevertap-web-sdk/pull/417"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/clevertap/clevertap-web-sdk","events":[{"introduced":"0"},{"last_affected":"4d2e60f4f975c39675642dfaa289332c6c04dc56"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.15.2"}]}}],"versions":["1.0.0-beta.1","1.11.5","1.11.8","v1.0.0","v1.0.0-beta.0","v1.0.0-beta.1","v1.0.0-beta.2","v1.0.0-beta.3","v1.0.0-beta.4","v1.0.0-beta.5","v1.0.0-beta.6","v1.0.0-beta.7","v1.1.0","v1.1.1","v1.1.1-release","v1.1.2","v1.1.3","v1.10.0","v1.10.1","v1.11.0","v1.11.1","v1.11.10","v1.11.11","v1.11.12","v1.11.13","v1.11.14","v1.11.15","v1.11.16","v1.11.2","v1.11.3","v1.11.4","v1.11.6","v1.11.7","v1.11.9","v1.12.0","v1.12.1","v1.13.0","v1.13.1","v1.13.2","v1.13.3","v1.13.4","v1.13.5","v1.13.6","v1.13.7","v1.14.0","v1.14.1","v1.14.2","v1.14.3","v1.14.4","v1.15.0","v1.15.1","v1.15.2","v1.2.0","v1.2.1","v1.3.0","v1.3.1","v1.3.2","v1.3.3","v1.3.4","v1.3.5","v1.4.0","v1.4.1","v1.4.2","v1.5.0","v1.5.1","v1.5.2","v1.6.0","v1.6.1","v1.6.10","v1.6.2","v1.6.3","v1.6.4","v1.6.5","v1.6.6","v1.6.7","v1.6.8","v1.6.9","v1.6.9-sw","v1.7.0","v1.7.1","v1.7.2","v1.7.3","v1.7.4","v1.7.5","v1.7.6","v1.8.0","v1.8.1","v1.8.2","v1.8.3","v1.9.0","v1.9.1","v1.9.2","v1.9.3","v1.9.4","v1.9.5","v1.9.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26862.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L"}]}