In OpenStack Mistral through 23.0.0, the std.ssh_proxied action passes a caller-supplied proxy_command value directly to paramiko.ProxyCommand() before any SSH connection to a gateway or target host is attempted. An authenticated project member can use the standard action-execution API to submit an arbitrary local command as proxy_command; paramiko starts that command as a subprocess on the executor host under the executor's own service account, independent of whether the SSH connection itself ever succeeds. Only Mistral deployments that permit the std.ssh_proxied action, the default configuration, are affected.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OpenStack Mistral unaffected
Version Status Constraints
0 affected < 20.1.1
21.0.0 affected < 21.0.1
22.0.0 affected < 22.0.1
23.0.0 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Openstack Subscribe
Mistral Subscribe

Project Subscriptions

Vendors Products
Openstack Subscribe
Mistral Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://launchpad.net/bugs/2162100 cve-icon cve-icon
https://security.openstack.org/ossa/OSSA-2026-044.html cve-icon cve-icon
History

Thu, 08 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Openstack
Openstack mistral
Vendors & Products Openstack
Openstack mistral

Thu, 08 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Title Unvalidated SSH ProxyCommand Allows Arbitrary Command Execution in OpenStack Mistral

Thu, 08 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description In OpenStack Mistral through 23.0.0, the std.ssh_proxied action passes a caller-supplied proxy_command value directly to paramiko.ProxyCommand() before any SSH connection to a gateway or target host is attempted. An authenticated project member can use the standard action-execution API to submit an arbitrary local command as proxy_command; paramiko starts that command as a subprocess on the executor host under the executor's own service account, independent of whether the SSH connection itself ever succeeds. Only Mistral deployments that permit the std.ssh_proxied action, the default configuration, are affected.
Weaknesses CWE-78
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:N/SA:N'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-08T17:56:35.058Z

Reserved: 2026-09-18T19:09:49.629Z

Link: CVE-2026-93858

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T18:18:30.817

Modified: 2026-10-08T18:18:30.817

Link: CVE-2026-93858

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T19:15:20Z

Weaknesses