Apache MINA SSHD up to 2.18.0/3.0.0-M4 sshd-git path traversal

Summaryinfo

A vulnerability was found in Apache MINA SSHD up to 2.18.0/3.0.0-M4. It has been declared as critical. Affected is an unknown function of the component sshd-git. Executing a manipulation can lead to path traversal. The identification of this vulnerability is CVE-2026-56623. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Apache MINA SSHD up to 2.18.0/3.0.0-M4. This vulnerability affects some unknown processing of the component sshd-git. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Path traversal on Windows in Apache MINA SSHD component sshd-git. Apache MINA SSHD is a Java library for client-side and server-side SSH. A git server implemented with Apache MINA SSHD component sshd-git and running on Windows could allow an authenticated remote user access to git repositories outside of the configured server-side root directory. The path validation applied for CVE-2026-48827 in Apache MINA SSHD 2.18.0 and 3.0.0-M4 was partly ineffective for Servers running on Windows. Applications are affected if they use org.apache.sshd:sshd-git to implement a git server and run on Windows. Applications not using sshd-git or not running on Windows are not affected. Users are advised to upgrade affected applications to Apache MINA SSHD 2.19.0, which fixes the issue. The issue also is present in the pre-release milestones 3.0.0-M1 to 3.0.0-M4 for a new upcoming new major version 3.0.0. Again, applications are affected only if they use sshd-git and run on Windows. Upgrade affected applications to 3.0.0-M5.

The advisory is shared for download at lists.apache.org. This vulnerability was named CVE-2026-56623 since 06/22/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/20/2026). The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 2.19.0 or 3.0.0-M4 eliminates this vulnerability.

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Productinfo

Type

• SSH Server Software

Vendor

• Apache

Name

• MINA SSHD

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18.0
• 3.0.0-M4

License

• open-source

Website

• Vendor: https://www.apache.org/

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