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VULNERABILITIES

CVE-2026-48798 Details

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

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/sshnet/SSH.NET/commit/600be0de543765995a189b5d7cd4efac5007f3ce [email protected]
https://github.com/sshnet/SSH.NET/releases/tag/2026.0.0 [email protected]
https://github.com/sshnet/SSH.NET/security/advisories/GHSA-q939-rpr3-3284 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')[email protected]
CWE-73External Control of File Name or Path[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-48798
NVD Published Date:
Aug 18, 2026
NVD Last Modified:
Sep 18, 2026
Source:
[email protected]
CVE-2026-48798 Details - Not Deferred