Security Advisory

CVE-2026-26861

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-02-27 00:00:00

Last updated 2026-02-27 19:42:58

Assigner mitre

State PUBLISHED

Description

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

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