CVE-2026-93861 OpenStack CVE debrief

Who should care

Defenders responsible for OpenStack Mistral deployments, especially those with shared workflows or multi-project environments, should assess exposure and verify access controls. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review workflow membership and access controls, and implement compensating controls if necessary. They should also verify exposure in OpenStack Mistral deployments, and

Why it matters

Defenders should care about CVE-2026-93861 because it allows unauthorized access to private workflows in OpenStack Mistral, potentially leading to sensitive data exposure or unintended workflow execution. Roles responsible for OpenStack Mistral deployments, especially those with shared workflows or multi-project environments, should assess exposure and verify access controls. The vulnerability's impact is supported by the CVE record and source item, but further verification is needed to determine the full scope of affected versions and potential remediation.

• Potential unauthorized access to private workflows
• Possible execution of private workflows by unintended parties
• Need for verification of workflow membership and access controls
• Potential for lateral movement or privilege escalation

Technical summary

A vulnerability in OpenStack Mistral allows a project that has accepted a share of another project's private workflow to create a further membership naming a third project, potentially granting unauthorized access to the owner's private workflow. This could allow unintended parties to read and execute the owner's private workflow. The vulnerability's impact is supported by the CVE record and source item, but further verification is needed to determine the full scope of affected versions and potential remediation. Defenders should prioritize verifying exposure in OpenStack Mistral deployments, especially for versions 20.1.1 and later, and assess the need for compensating controls.

Defensive priority

Defenders should prioritize verifying exposure in OpenStack Mistral deployments, especially for versions 20.1.1 and later, and assess the need for compensating controls.

Recommended defensive actions

• Verify OpenStack Mistral version and assess exposure
• Review workflow membership and access controls
• Implement compensating controls if necessary
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability in OpenStack Mistral, including its description and affected versions. Evidence limits suggest that the vulnerability's impact is supported, but verification is needed for affected scope and remediation. Defenders should verify exposure in OpenStack Mistral deployments, especially for versions 20.1.1 and later, and assess the need for compensating controls. The source item and CVE record provide grounding for the vulnerability's existence and impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.