CVE-2026-93860
Received Received - Intake

OpenStack Mistral Unauthorized Maintenance State Modification

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: MITRE

Description
In OpenStack Mistral through 23.0.0, the /v2/maintenance API controller clears the request context and calls the maintenance service directly without any policy enforcement. Any holder of a valid Mistral token, regardless of assigned role, can read and change the service's cluster-wide maintenance state. Setting the state to PAUSED stops processing of new workflow and execution objects across all tenant projects until an operator restores it.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-93860
EUVD
EUVD-2026-95129

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
OpenStack Mistral 0
OpenStack Mistral 21.0.0
OpenStack Mistral 22.0.0
OpenStack Mistral 23.0.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability in OpenStack Mistral through version 23.0.0 allows any user with a valid token to read or modify the service's cluster-wide maintenance state via the /v2/maintenance API. The API fails to enforce role-based access controls, letting unauthorized users set the state to PAUSED, which halts processing of workflows and executions across all tenant projects until an operator intervenes.

Impact Analysis

If exploited, this flaw could disrupt all workflow and execution processing in your OpenStack Mistral environment. Attackers could pause critical operations, leading to service outages, delayed tasks, or denial of service for all tenant projects. Even users without administrative privileges can trigger this issue.

Compliance Impact

This vulnerability could impact compliance by enabling unauthorized access to system-wide maintenance controls, potentially violating data integrity or availability requirements in GDPR or HIPAA. Unauthorized pauses in workflow processing might disrupt critical data handling operations, leading to compliance violations.

Mitigation Strategies

Immediately restrict access to the /v2/maintenance API endpoint. Review Mistral tokens and roles to ensure only authorized operators can modify the maintenance state. Monitor workflow and execution objects for unexpected pauses.

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