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
History

Fri, 27 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-346
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 27 Feb 2026 17:30:00 +0000

Type Values Removed Values Added
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
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-27T19:42:58.097Z

Reserved: 2026-02-16T00:00:00.000Z

Link: CVE-2026-26861

cve-icon Vulnrichment

Updated: 2026-02-27T19:41:16.290Z

cve-icon NVD

Status : Received

Published: 2026-02-27T18:16:12.043

Modified: 2026-02-27T20:21:37.167

Link: CVE-2026-26861

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.