Threat Intelligence Database

CVE-2026-56623 is a path traversal vulnerability affecting Apache MINA SSHD's sshd-git component on Windows systems. This flaw allows an authenticated remote user to access git repositories outside the configured server-side root directory due to ineffective path validation on Windows. The issue affects applications using sshd-git on Windows and was fixed in Apache MINA SSHD version 2.19.0 and 3.0.0-M5. Versions 2.0.0 and pre-release 3.0.0-M1 to 3.0.0-M4 are vulnerable.

Improper input validation in sshd-git in Apache MINA SSHD. Apache MINA SSHD is a Java library for client-side and server-side SSH. Component org.apache.sshd:sshd-git provides though its GitPgmCommandFactory a way to configure an Apache MINA SSHD server such that SSH clients can remotely execute git commands via the JGit library on git repositories stored on the server. This GitPgmCommandFactory allowed a user authenticated via SSH to run any JGit command available, including commands that could write files at arbitrary places such as git archive with the --output option. Affected are SSH servers implemented with Apache MINA SSHD and using the GitPgmCommandFactory. If the GitPgmCommandFactory is not configured on the server, the server is not affected. It is recommended to upgrade affected servers to Apache MINA SSHD 2.19.0 or 3.0.0-M5, which fix this issue. The issue is fixed by restricting the available commands to a small whitelist of uncritical commands (such as git log). git archive is also allowed, but its --output argument is ignored and the archive is always sent through the SSH channel to the client.

A path traversal vulnerability (CWE-22) exists in Apache MINA SSHD's sshd-git bundle, allowing authenticated SSH users to access git repositories outside the configured server root directory due to insufficient path validation in git-upload-pack, git-receive-pack, and related operations. This affects applications using org.apache.sshd:sshd-git. The issue is fixed in Apache MINA SSHD version 2.18.0 and in milestone 3.0.0-M4. Users should upgrade to these versions to mitigate the vulnerability. Additional security controls beyond file system permissions are recommended for professional git servers.