CVEvulnerability

CVE-2026-26861

8.3 HIGH Published 2026-02-27 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-27
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Weaknesses
CWE-346

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

Affected configurations

• clevertap clevertap web sdk (<= 1.15.2)

Related

Weakness · CWE (1)

  • CWE-346 Origin Validation Error weakness

References