CVE-2026-93858
In OpenStack Mistral through 23.0.0, the std.ssh_proxied action passes a caller-supplied...
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 profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
8.7
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.
- Record
CVE-2026-93858- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-78
- Updated
- 2026-11-02
EUVDEUVD-2026-95121
8.7
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.
- Record
EUVD-2026-95121- CVSS 4.0
- 8.7 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gxqc-3r52-88h8
8.7
In OpenStack Mistral through 23.0.0, the std.ssh_proxied action passes a caller-supplied...
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.
- Record
GHSA-gxqc-3r52-88h8- CVSS 4.0
- 8.7 High
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-78
- Updated
- 2026-11-02
NVD
8.7
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.
- Record
CVE-2026-93858- CVSS 4.0
- 8.7 High
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-78
- Updated
- 2026-11-02
OSV
8.7
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.
- Record
CVE-2026-93858- CVSS 4.0
- 8.7 High
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 - Weakness
- CWE-78
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-93858
8.7
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.
- Record
DEBIAN-CVE-2026-93858- CVSS 4.0
- 8.7 High
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-93858
8.7
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.
- Record
UBUNTU-CVE-2026-93858- CVSS 4.0
- 8.7 High
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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mistralDebian:12 |
All versions, plus listed versions 15.0.0-115.0.0-1+deb12u116.0.0-116.0.0-216.0.0-3 Show 32 moreShow less16.0.0-416.0.0~rc1-117.0.0-117.0.0-217.0.0-317.0.0~rc1-118.0.0~rc1-118.0.1-119.0.0-119.0.0-219.0.0~rc1-119.0.0~rc1-220.0.0-120.0.0-220.0.0~rc1-120.0.0~rc1-221.0.0-121.0.0-221.0.0-421.0.0-521.0.0-621.0.0~rc1-121.0.0~rc1-222.0.0-122.0.0-322.0.0~rc1-122.0.0~rc1-222.0.0~rc1-323.0.0-123.0.0-223.0.0~rc1-123.0.0~rc1-2 |
None known |
mistralDebian:13 |
All versions, plus listed versions 20.0.0-220.0.0-2+deb13u121.0.0-121.0.0-221.0.0-4 Show 13 moreShow less21.0.0-521.0.0-621.0.0~rc1-121.0.0~rc1-222.0.0-122.0.0-322.0.0~rc1-122.0.0~rc1-222.0.0~rc1-323.0.0-123.0.0-223.0.0~rc1-123.0.0~rc1-2 |
None known |
mistralDebian:14 |
before 23.0.0-2, plus listed versions 20.0.0-221.0.0-121.0.0-221.0.0-421.0.0-5 Show 11 moreShow less21.0.0-621.0.0~rc1-121.0.0~rc1-222.0.0-122.0.0-322.0.0~rc1-122.0.0~rc1-222.0.0~rc1-323.0.0-123.0.0~rc1-123.0.0~rc1-2 |
23.0.0-2 |
mistralUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.0.0-11.0.0-42.0.0~b3-32.0.0~rc1-12.0.0~rc2-12.0.0-12.0.0-1ubuntu22.0.0-1ubuntu2+esm1 |
None known |
mistralUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 5.0.0-0ubuntu16.0.0~b1-0ubuntu16.0.0~b1-0ubuntu26.0.0~b2-0ubuntu16.0.0~rc1-0ubuntu16.0.0-0ubuntu16.0.0-0ubuntu1.16.0.0-0ubuntu1.1+esm1 |
None known |
mistralUbuntu:20.04:LTS |
All versions, plus listed versions 9.0.0-0ubuntu110.0.0~b1~git2019121815.bc46b29f-0ubuntu110.0.0~b2~git2020020609.5b5576dd-0ubuntu110.0.0~b3~git2020032611.8a5d35ac-0ubuntu110.0.0~b3~git2020041013.a7da00d7-0ubuntu110.0.0-0ubuntu0.20.04.1 |
None known |
mistralUbuntu:22.04:LTS |
All versions, plus listed versions 13.0.0-0ubuntu113.0.0+git2021120910.b2d6de56-0ubuntu113.0.0+git2022030313.55bb2564-0ubuntu114.0.0-0ubuntu114.0.0-0ubuntu1.1 |
None known |
mistralUbuntu:24.04:LTS |
All versions, plus listed versions 17.0.0-0ubuntu118.0.0~rc1-0ubuntu118.0.1-0ubuntu118.0.1-0ubuntu1.1 |
None known |
mistralUbuntu:26.10 |
All versions, plus listed versions 22.0.0-0ubuntu122.0.0-0ubuntu222.0.0+git20260814.61.b4aeb55-0ubuntu123.0.0~rc1-0ubuntu123.0.0-0ubuntu1 |
None known |
mistralUbuntu:26.04:LTS |
All versions, plus listed versions 21.0.0-0ubuntu121.0.0+git20260106.10.420677c8-0ubuntu122.0.0-0ubuntu122.0.0-0ubuntu1.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-93858 is a high vulnerability (CVSS 8.7) in Openstack Mistral, published October 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in mistral 23.0.0-2.
References
launchpad.net/bugs/2162100
security.openstack.org/ossa/OSSA-2026-044.html
nvd.nist.gov/vuln/detail/CVE-2026-93858
github.com/advisories/GHSA-gxqc-3r52-88h8
opendev.org/openstack/mistral
github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93858.json
security-tracker.debian.org/tracker/CVE-2026-93858
ubuntu.com/security/CVE-2026-93858
cve.org/CVERecord?id=CVE-2026-93858