CVE-2026-48798

SSH.NET is a Secure Shell SSH library for .NET. In 2025.1.0 and earlier, ScpClient.Downloadstring 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, allowin...

CVE-2026-48798

SSH.NET is a Secure Shell SSH library for .NET. In 2025.1.0 and earlier, ScpClient.Downloadstring 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, allowin...

EUVD-2026-60945

SSH.NET is a Secure Shell SSH library for .NET. In 2025.1.0 and earlier, ScpClient.Downloadstring 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, allowin...

CVE-2026-48798 SSH.NET: ScpClient Recursive Download Allows Arbitrary File Write via Server-Controlled SCP Filenames

SSH.NET is a Secure Shell SSH library for .NET. In 2025.1.0 and earlier, ScpClient.Downloadstring 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, allowin...

curl: curl: Man-in-the-middle attack via SSH host key bypass

A flaw was found in curl. When a libcurl-based application uses SCP:// or SFTP:// for transfers and employs the CURLOPTSSHKEYFUNCTION callback, it may silently accept an untrusted server. This occurs if the server's host key type differs from the one stored in the knownhosts file. The callback...

curl: curl: SSH host verification bypass when using schemeless URLs with SFTP/SCP

A flaw was found in curl. When a user invokes curl with a schemeless URL and specifies SFTP SSH File Transfer Protocol or SCP Secure Copy Protocol as the default protocol, the tool layer fails to initialize critical SSH security options. This bypasses host verification, allowing curl to connect t...

External Control of File Name or Path

Overview SSH.NET is a Secure Shell SSH library for .NET, optimized for parallelism and with broad framework support. Affected versions of this package are vulnerable to External Control of File Name or Path via server-controlled SCP filenames through the recursive download path in...

GHSA-Q939-RPR3-3284 SSH.NET: ScpClient Recursive Download Allows Arbitrary File Write via Server-Controlled SCP Filenames

Summary ScpClient.Downloadstring directoryName, DirectoryInfo directoryInfo writes files and directories using names returned by the remote SCP server during recursive downloads, with no validation that the resulting path stays inside the requested local directory. A malicious, compromised, or...

K000162881: libcurl vulnerability CVE-2026-9547

Security Advisory Description When a libcurl-based application performs transfers via SCP:// or SFTP:// and utilizes the CURLOPTSSHKEYFUNCTION callback, it may silently accept an untrusted server. This vulnerability occurs when a server presents a host key type that does not match the specific ke...

PT-2026-76562

Summary ScpClient.Downloadstring directoryName, DirectoryInfo directoryInfo writes files and directories using names returned by the remote SCP server during recursive downloads, with no validation that the resulting path stays inside the requested local directory. A malicious, compromised, or...

Astra Linux – Vulnerability in curl

When performing SSH-based transfers using either SCP or SFTP, and setting the knownhosts file, libcurl may still mistakenly accept connections to hosts that are not present in the specified file, if those hosts are added as recognized in the libssh global knownhosts file...

Medium: openssh

Issue Overview: A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange DH-GEX client path. This occurs during FIPS Federal Information Processing Standards mode known-group validation when the client processes...

openSUSE 16: openssh / openssh-askpass-gnome / openssh-cavs / openssh-clients / etc (openSUSE-SU-2026:21477-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21477-1 advisory. - CVE-2026-59995: sftp: location of downloaded files not properly constrained when sftp server:/path . is used with an attacker-controlled serve...

AlmaLinux 9 : openssh (ALSA-2026:47756)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:47756 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in AlmaLinux OpenSSH client versions CVE-2026-55655 openssh: Double free in...

RLSA-2026:47756 Important: openssh security update

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fixes: openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux...

RLSA-2026:47757 Important: openssh security update

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server. Security Fixes: openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux...

Important: Red Hat Security Advisory: openssh security update

An update for openssh is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

RockyLinux 9 : openssh (RLSA-2026:47756)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:47756 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux OpenSSH client versions CVE-2026-55655 openssh: Double free in...

AlmaLinux 10 : openssh (ALSA-2026:47757)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:47757 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in AlmaLinux OpenSSH client versions CVE-2026-55655 openssh: Double free in...

RockyLinux 10 : openssh (RLSA-2026:47757)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:47757 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Rocky Linux OpenSSH client versions CVE-2026-55655 openssh: Double free i...