
CVE catalog
CVE-2026-93858
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 i
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mistral | sid | 23.0.0-4 | fixed |
| Debian | mistral | forky | 23.0.0-2 | fixed |
| Debian | mistral | trixie | 20.0.0-2+deb13u1 | vulnerable |
| Debian | mistral | trixie-security | 20.0.0-2+deb13u1 | vulnerable |
| Debian | mistral | bookworm | 15.0.0-1+deb12u1 | vulnerable |
| Debian | mistral | bookworm-security | 15.0.0-1+deb12u1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mistral | source | sid | 23.0.0-2 | not yet assigned | Not reported | [1150346] |
| Debian | mistral | source | forky | 23.0.0-2 | not yet assigned | Not reported | [1150346] |
| Debian | mistral | source | trixie | (unfixed) | not yet assigned | Not reported | [1150346] |
| Debian | mistral | source | bookworm | (unfixed) | not yet assigned | Not reported | [1150346] |
Notes
[trixie] mistral: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [mistral-api]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
- [mistral-common]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
- [mistral-engine]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
- [mistral-event-engine]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
- [mistral-executor]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
- [python3-mistral]Affected
Source package: [mistral]
Details (4)
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookwormAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
15.0.0-1+deb12u1· all · bookworm-securityAffected
nvd · mistral · debian · bookworm; nvd · mistral · debian · 12
[Debian 13 (Trixie)]
- [mistral-api]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
- [mistral-common]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
- [mistral-engine]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
- [mistral-event-engine]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
- [mistral-executor]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
- [python3-mistral]Affected
Source package: [mistral]
Details (4)
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixieAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
20.0.0-2+deb13u1· all · trixie-securityAffected
nvd · mistral · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-93858]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-93858]
- [https://security-tracker.debian.org/tracker/CVE-2026-93858]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93858.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]