CVE-2026-26861
CVE-2026-26861
This page contains facts from public vulnerability sources. Check the original advisory before updating.
CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewPostMessageEvent function in src/util/campaignRender/nativeDisplay.js performs insufficient origin validation using the includes() method, which can be bypassed by an attacker using a subdomain
CVSS 8.3 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
clevertap-web-sdk npm
- Affected ranges
- SEMVER: < 1.15.3
Update to 1.15.3