---
cve: "CVE-2026-91166"
severity: "MEDIUM"
cvss: 5.7
epss: "0.2%"
vendor: "warp-tech"
kev: false
exploited: false
published: "2026-09-21 19:17:15"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T07:19:59+02:00"
---

# CVE-2026-91166

> 5.7 MEDIUM · 🧪 PoC

## Beschreibung

Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.25.0 until 0.27.6, the browser SSH path in warpgate-web-ssh/src/manager.rs handles RCEvent::HostKeyUnknown without the presenting hop identity and instead passes ssh_options.host and ssh_options.port for the final target to KnownHosts::trust. In Prompt and AutoAccept modes, a jump host key can therefore be stored for the target address. A machine later presenting the jump host key at the target address can be accepted as the target, allowing interception of user traffic and a newly issued certificate when certificate authentication is used. The native SSH path is unaffected because it tracks each hop separately. This issue is fixed in version 0.27.6.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 3f166ef2fb27d3e6785df315fdc39914f0568404 (Commit)

## Referenzen

- <https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f>
- <https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3>
- <https://github.com/warp-tech/warpgate/releases/tag/v0.27.6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-91166) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_