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CVE-2026-8152

CRITICAL
9.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-8152
State
PUBLISHED
Assigner
NCSC.ch
Reserved
2026-05-08 08:12 UTC
Published
2026-07-22 12:21 UTC
Last updated
2026-07-22 12:21 UTC
Primary CWE
CWE-601
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Vendor / Product
Unblu inc. / Unblu Spark
Sources
cve.org  ·  NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Affected products (1)
VendorProductPlatformVersions
Unblu inc. Unblu Spark On-premises,Cloud 0 ≤ 8.36.1, 8.36.1-hotfix.0, 8.37.0
Weakness (CWE)
CWESourceDescription
CWE-601 cna CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
CWE-79 cna CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
7.0 HIGH 4.0 cna 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
References (1)
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