CleverTap Web SDK up to 1.15.2 Visual Builder pageBuilder.js includes cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in CleverTap Web SDK up to 1.15.2. This issue affects the function includes of the file src/modules/visualBuilder/pageBuilder.js of the component Visual Builder Module. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-26862. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in CleverTap Web SDK up to 1.15.2. This affects the function includes of the file src/modules/visualBuilder/pageBuilder.js of the component Visual Builder Module. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-26862 since 02/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-9039). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 8.3
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

02/16/2026 CVE reserved
02/27/2026 +11 days Advisory disclosed
02/27/2026 +0 days VulDB entry created
03/05/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: 442
Status: Confirmed

CVE: CVE-2026-26862 (🔒)
GCVE (CVE): GCVE-0-2026-26862
GCVE (VulDB): GCVE-100-348231
EUVD: 🔒

Entryinfo

Created: 02/27/2026 22:24
Updated: 03/05/2026 19:24
Changes: 02/27/2026 22:24 (67), 03/01/2026 05:57 (1), 03/05/2026 19:24 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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