OpenStack Mistral up to 20.1.0/21.0.0/22.0.0/23.0.0 Workflow Membership API privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in OpenStack Mistral up to 20.1.0/21.0.0/22.0.0/23.0.0. Affected by this vulnerability is an unknown functionality of the component Workflow Membership API. Such manipulation leads to privileges management. This vulnerability is traded as CVE-2026-93861. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OpenStack Mistral up to 20.1.0/21.0.0/22.0.0/23.0.0. Affected by this issue is an unknown functionality of the component Workflow Membership API. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In OpenStack Mistral through 23.0.0, the workflow membership API lets a project that has accepted a share of another project's private workflow create a further membership naming a third project. The new membership row is created with its project_id defaulted to the accepting project rather than the original workflow owner, and thus the owner can neither see nor delete it. The third project can accept this membership (that it had not actually been granted by the owner), and then read and execute the owner's private workflow; only the accepting (not the owning) project can later revoke that access.

The advisory is available at launchpad.net. This vulnerability is handled as CVE-2026-93861 since 09/18/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 20.1.1, 21.0.1 or 22.0.1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Cloud Software

Vendor

• OpenStack

Name

• Mistral

Version

• 20.0
• 20.1.0
• 21.0
• 22.0
• 23.0

License

• free

Website

• Vendor: https://www.openstack.org/

CPE 2.3info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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