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CVE-2026-8152— Unblu Spark Open Redirect leading to DOM-Based XSS

Quick assessment

Affected
Unblu inc. Unblu Spark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Unblu Spark是瑞士Unblu公司的一种以对话为核心的数字客户体验平台中的一个关键组件。 Unblu Spark 8.36.1及之前版本存在安全漏洞，该漏洞源于开放重定向，可升级为基于DOM的跨站脚本攻击，可能导致注入的JavaScript代码完全访问主应用程序的Cookie、DOM和同源API。

AI Predicted 9.8 Difficulty: Easy EPSS 0.41% · P33

Affected Version Matrix 3

VendorProduct Version RangeStatus
Unblu inc. Unblu Spark ≤ 8.36.1 affected
8.36.1-hotfix.0 unaffected
8.37.0 unaffected
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I. Basic Information for CVE-2026-8152

Vulnerability Information
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Vulnerability Title
Unblu Spark Open Redirect leading to DOM-Based XSS
Source: CVE Program / CVE List V5
Vulnerability Description
Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack. When Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application's cookies, DOM, and same-origin APIs — an attacker can reach all resources of the host application, not just Unblu's. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Unblu Spark 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unblu Spark是瑞士Unblu公司的一种以对话为核心的数字客户体验平台中的一个关键组件。 Unblu Spark 8.36.1及之前版本存在安全漏洞，该漏洞源于开放重定向，可升级为基于DOM的跨站脚本攻击，可能导致注入的JavaScript代码完全访问主应用程序的Cookie、DOM和同源API。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unblu inc. Unblu Spark 0 ~ 8.36.1 -

II. Public POCs for CVE-2026-8152

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III. Intelligence Information for CVE-2026-8152

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Vendor Advisories for CVE-2026-8152 (1)

IV. Related Vulnerabilities

Same product: Unblu Spark
Same vendor: Unblu inc.
Same weakness: CWE-601

V. Comments for CVE-2026-8152

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