---
cve: "CVE-2026-48108"
severity: "MEDIUM"
cvss: 5.3
epss: "0.3%"
vendor: "Eugeny"
kev: false
exploited: false
published: "2026-06-10 22:17:01"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T17:42:35+02:00"
---

# CVE-2026-48108

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did not enforce the SSH identification-string rules as deliberately as OpenSSH. In particular, the server-side identification reader used the same permissive path as the client, allowing pre-banner lines from clients, and the reader did not enforce a bounded number of pre-banner lines. For a library server built on russh, this could allow a remote peer to hold connection setup resources in the cleartext pre-authentication phase with malformed identification input that should have been rejected early. This issue has been patched in version 0.61.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 1947d6b1bb3a9d79840b5adf7eb9b33df2c6e4a7 (Commit)

## Referenzen

- <https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48108) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_