CVE-2026-26861

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Source
https://cve.org/CVERecord?id=CVE-2026-26861
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26861.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26861
Aliases
Published
2026-02-27T18:16:12.043Z
Modified
2026-03-13T04:11:41.977823Z
Severity
  • 8.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L CVSS Calculator
Summary
[none]
Details

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

Affected packages

Git / github.com/clevertap/clevertap-web-sdk

Affected ranges

Type
GIT
Repo
https://github.com/clevertap/clevertap-web-sdk
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
4d2e60f4f975c39675642dfaa289332c6c04dc56
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.15.2"
        }
    ]
}

Affected versions

1.*
1.0.0-beta.1
1.11.5
1.11.8
v1.*
v1.0.0
v1.0.0-beta.0
v1.0.0-beta.1
v1.0.0-beta.2
v1.0.0-beta.3
v1.0.0-beta.4
v1.0.0-beta.5
v1.0.0-beta.6
v1.0.0-beta.7
v1.1.0
v1.1.1
v1.1.1-release
v1.1.2
v1.1.3
v1.10.0
v1.10.1
v1.11.0
v1.11.1
v1.11.10
v1.11.11
v1.11.12
v1.11.13
v1.11.14
v1.11.15
v1.11.16
v1.11.2
v1.11.3
v1.11.4
v1.11.6
v1.11.7
v1.11.9
v1.12.0
v1.12.1
v1.13.0
v1.13.1
v1.13.2
v1.13.3
v1.13.4
v1.13.5
v1.13.6
v1.13.7
v1.14.0
v1.14.1
v1.14.2
v1.14.3
v1.14.4
v1.15.0
v1.15.1
v1.15.2
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.4.0
v1.4.1
v1.4.2
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.1
v1.6.10
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9
v1.6.9-sw
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4
v1.9.5
v1.9.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26861.json"