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Vulnerability Details :

CVE-2026-26862

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-27 Feb, 2026 | 00:00
Updated At-27 Feb, 2026 | 19:39
Rejected At-
Credits

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

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:27 Feb, 2026 | 00:00
Updated At:27 Feb, 2026 | 19:39
Rejected At:
▼CVE Numbering Authority (CNA)

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

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/CleverTap/clevertap-web-sdk/issues/442
N/A
https://github.com/CleverTap/clevertap-web-sdk/pull/417
N/A
https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60
N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/issues/442
Resource: N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/pull/417
Resource: N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-829CWE-829 Inclusion of Functionality from Untrusted Control Sphere
CWECWE-79CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-829
Description: CWE-829 Inclusion of Functionality from Untrusted Control Sphere
Type: CWE
CWE ID: CWE-79
Description: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.18.3HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Version: 3.1
Base score: 8.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:27 Feb, 2026 | 18:16
Updated At:02 Mar, 2026 | 20:30

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

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.3HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Type: Secondary
Version: 3.1
Base score: 8.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-79Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-829Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-79
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-829
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60cve@mitre.org
N/A
https://github.com/CleverTap/clevertap-web-sdk/issues/442cve@mitre.org
N/A
https://github.com/CleverTap/clevertap-web-sdk/pull/417cve@mitre.org
N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/modules/visualBuilder/pageBuilder.js#L56-L60
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/issues/442
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://github.com/CleverTap/clevertap-web-sdk/pull/417
Source: cve@mitre.org
Resource: N/A

Change History

0
Information is not available yet

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