Apache MINA SSHD up to 2.18.0/3.0.0-M3 GitPgmCommandFactory input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apache MINA SSHD up to 2.18.0/3.0.0-M3. This affects an unknown function of the component GitPgmCommandFactory. This manipulation causes input validation. This vulnerability appears as CVE-2026-58624. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Apache MINA SSHD up to 2.18.0/3.0.0-M3. Affected by this vulnerability is an unknown functionality of the component GitPgmCommandFactory. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2026-58624 since 07/01/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2026).

Upgrading to version 2.19.0 or 3.0.0-M5 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-M3

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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