TI-2026-07180 Aliases CVE-2026-8152 GHSA-6f3h-gqrm-69gc

Unblu Spark Open Redirect leading to DOM-Based XSS

MEDIUM 40CWE-601Published 2026-07-22 · Updated 2026-07-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: None
Impact type: Spoofing, Cross-site scripting
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601 and CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00414 35th percentileScored 2026-11-07

Fix Fixed Unblu Spark (Unblu inc.): 8.36.1-hotfix.0, 8.37.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unblu inc.	Unblu Spark	up to 8.36.1	8.36.1-hotfix.0, 8.37.0	Patch available	CNA

Unblu Spark VendorUnblu inc. Affected up to 8.36.1 Fixed in 8.36.1-hotfix.0, 8.37.0 Patch available CNA

Remediation

Fix · CNA Unblu Spark (Unblu inc.) Fixed in 8.36.1-hotfix.0, 8.37.0

Timeline

2026-10-02 Threatist record created from CVE-2026-8152
2026-10-03 Alias added: GHSA-6f3h-gqrm-69gc

References

Advisory 1

Unblu Security Advisories

TI-2026-76784 Missing authorization in Unblu Spark configuration cascade operations CVSS 4.0CRITICAL 9.3
TI-2026-76785 Cross-site scripting in Unblu Spark embedded co-browsing CVSS 4.0HIGH 8.6
TI-2025-03091 Replace uploaded files knowing the file upload ID CVSS 4.0HIGH 7.0
TI-2025-03090 File upload functionality possible even when disabled CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences