CVE-2026-48798
Last modified
CVE-2026-48798 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. SSH.NET is a Secure Shell (SSH) library for .NET. In 2025.1.0 and earlier, ScpClient.Download(string directoryName, DirectoryInfo directoryInfo) trusts file and directory names returned by a remote SCP server and combines them with the requested local directory without containment validation, allowing a malicious, compromised, or man-in-the-middle server to use ../ sequences or absolute paths to create or overwrite files anywhere writable by the client process. EPSS estimates a 0.38% chance of exploitation in the next 30 days.
Description
SSH.NET is a Secure Shell (SSH) library for .NET. In 2025.1.0 and earlier, ScpClient.Download(string directoryName, DirectoryInfo directoryInfo) trusts file and directory names returned by a remote SCP server and combines them with the requested local directory without containment validation, allowing a malicious, compromised, or man-in-the-middle server to use ../ sequences or absolute paths to create or overwrite files anywhere writable by the client process. This issue is fixed in version 2026.0.0.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| sshnet | SSH.NET | < 2026.0.0 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-48798?
How severe is CVE-2026-48798?
How do I fix CVE-2026-48798?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-48792pam_usb provides hardware authentication for Linux using ord…4.4
- CVE-2026-48793Jellyfin is an open source self hosted media server. Prior t…8.8
- CVE-2026-48794Authelia is an open-source authentication and authorization …1.3
- CVE-2026-48795AdonisJS is a TypeScript-first web framework. From 10.1.3 un…8.6
- CVE-2026-48796CefSharp provides .NET bindings for the Chromium Embedded Fr…5.3
- CVE-2026-48797Backpropagate is a Python library for fine-tuning large lang…9.3
- CVE-2026-48799Postiz is an AI social media scheduling tool. Prior to 2.21.…7.7
- CVE-2026-4880The Barcode Scanner (+Mobile App) – Inventory manager, Order…9.8
- CVE-2026-48800Notepad++ is a free and open-source source code editor. Prio…7.8
- CVE-2026-48801linkify-it is a links recognition library with full Unicode …7.5
- CVE-2026-48802python-engineio is a Python implementation of the Engine.IO …7.5
- CVE-2026-48804python-socketio is a Python implementation of the Socket.IO …7.5
Are you affected by CVE-2026-48798?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST