---
title: "CVE-2026-9589: Unblu Spark - Broken Access Control"
description: "Unblu inc. Unblu Spark 7.0 through 8.36.1-hotfix.0 contains a broken access control vulnerability caused by missing authorization checks in configuration cascade operations, letting authenticated remote attackers read and modify unauthorized configuration properties, exploit requires authenticated session."
url: https://panop.io/threat-heartbeat/CVE-2026-9589/
---

# CVE-2026-9589 Unblu Spark - Broken Access Control

Unblu inc. Unblu Spark 7.0 through 8.36.1-hotfix.0 contains a broken access control vulnerability caused by missing authorization checks in configuration cascade operations, letting authenticated remote attackers read and modify unauthorized configuration properties, exploit requires authenticated session.

CVSS base score 9.3 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-9589)

## Details

Type

Broken Access Control

Impact

Data Tampering, Information Disclosure

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

20 October 2026

Updated

20 October 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to a version later than 8.36.1-hotfix.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-9589](https://nvd.nist.gov/vuln/detail/CVE-2026-9589)
- [https://docs.unblu.com/latest/security-bulletins/#UBL-2026-002](https://docs.unblu.com/latest/security-bulletins/#UBL-2026-002)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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