UBUNTU-CVE-2026-93858

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Source
https://ubuntu.com/security/CVE-2026-93858
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93858
Upstream
Published
2026-10-13T00:00:00Z
Modified
2026-10-14T03:23:48Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:20.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

9.*
9.0.0-0ubuntu1
10.*
10.0.0~b1~git2019121815.bc46b29f-0ubuntu1
10.0.0~b2~git2020020609.5b5576dd-0ubuntu1
10.0.0~b3~git2020032611.8a5d35ac-0ubuntu1
10.0.0~b3~git2020041013.a7da00d7-0ubuntu1
10.0.0-0ubuntu0.20.04.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        },
        {
            "binary_name":  "mistral-event-engine",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        },
        {
            "binary_name":  "python3-mistral",
            "binary_version":  "10.0.0-0ubuntu0.20.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"
Ubuntu:22.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

13.*
13.0.0-0ubuntu1
13.0.0+git2021120910.b2d6de56-0ubuntu1
13.0.0+git2022030313.55bb2564-0ubuntu1
14.*
14.0.0-0ubuntu1
14.0.0-0ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "14.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "14.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "14.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-event-engine",
            "binary_version":  "14.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "14.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "python3-mistral",
            "binary_version":  "14.0.0-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"
Ubuntu:24.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

17.*
17.0.0-0ubuntu1
18.*
18.0.0~rc1-0ubuntu1
18.0.1-0ubuntu1
18.0.1-0ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "18.0.1-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "18.0.1-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "18.0.1-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-event-engine",
            "binary_version":  "18.0.1-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "18.0.1-0ubuntu1.1"
        },
        {
            "binary_name":  "python3-mistral",
            "binary_version":  "18.0.1-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"
Ubuntu:26.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

21.*
21.0.0-0ubuntu1
21.0.0+git20260106.10.420677c8-0ubuntu1
22.*
22.0.0-0ubuntu1
22.0.0-0ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "22.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "22.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "22.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-event-engine",
            "binary_version":  "22.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "22.0.0-0ubuntu1.1"
        },
        {
            "binary_name":  "python3-mistral",
            "binary_version":  "22.0.0-0ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"
Ubuntu:Pro:16.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.0-1
1.0.0-4
2.*
2.0.0~b3-3
2.0.0~rc1-1
2.0.0~rc2-1
2.0.0-1
2.0.0-1ubuntu2
2.0.0-1ubuntu2+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "2.0.0-1ubuntu2+esm1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "2.0.0-1ubuntu2+esm1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "2.0.0-1ubuntu2+esm1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "2.0.0-1ubuntu2+esm1"
        },
        {
            "binary_name":  "python-mistral",
            "binary_version":  "2.0.0-1ubuntu2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"
Ubuntu:Pro:18.04:LTS
mistral

Package

Name
mistral
Purl
pkg:deb/ubuntu/mistral?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-0ubuntu1
6.*
6.0.0~b1-0ubuntu1
6.0.0~b1-0ubuntu2
6.0.0~b2-0ubuntu1
6.0.0~rc1-0ubuntu1
6.0.0-0ubuntu1
6.0.0-0ubuntu1.1
6.0.0-0ubuntu1.1+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "mistral-api",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        },
        {
            "binary_name":  "mistral-common",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        },
        {
            "binary_name":  "mistral-engine",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        },
        {
            "binary_name":  "mistral-event-engine",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        },
        {
            "binary_name":  "mistral-executor",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        },
        {
            "binary_name":  "python-mistral",
            "binary_version":  "6.0.0-0ubuntu1.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93858.json"