CVE-2026-9589 (GCVE-0-2026-9589)

Vulnerability from cvelistv5 – Published: 2026-10-20 11:01 – Updated: 2026-10-20 15:36
VLAI
Title
Unblu Spark Authorization Bypass in Configuration Cascade Operations
Summary
Missing authorization in the configuration cascade operations of the Collaboration Server in Unblu inc. Unblu Spark 7.0 through 8.36.1-hotfix.0, on on-premises and cloud deployments, allows an authenticated remote attacker to read and change configuration properties of entities they aren't authorized to access, including other users, other accounts and, in Unblu Cloud, other customers' accounts, via configuration read and write operations that target those entities. The Collaboration Server doesn't check whether the user reading or changing configuration has access to the entity the configuration belongs to. With certain non-default configuration validation settings, a registered user can additionally write configuration properties they aren't allowed to edit, in any scope. Exploitation requires an authenticated session but no user interaction.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:35 UTC
CWE
  • CWE-862 - Missing Authorization
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
NCSC.ch CNA under the mitre root
CNA scorecard B 80/100 over 76 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Unblu inc. Unblu Spark Affected: 7.0 , < 8.37.0 (semver)
guessed Create a notification for this product.
Show details on NVD website

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.