Description

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

INFO

Published Date :

2026-02-27T00:00:00.000Z

Last Modified :

2026-02-27T19:39:16.900Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2026-26862 vulnerability.

Vendors Products
Clevertap
  • Clevertap Web Sdk
  • Web Sdk
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-26862.

URL Resource
https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60 cve-icon cve-icon
https://github.com/CleverTap/clevertap-web-sdk/issues/442 cve-icon cve-icon
https://github.com/CleverTap/clevertap-web-sdk/pull/417 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact