CVE-2026-56623 Apache Software Foundation CVE debrief

Who should care

Developers and administrators using Apache MINA SSHD component sshd-git on Windows to implement git servers should be aware of this vulnerability. They need to assess if their applications are affected and upgrade to a fixed version to prevent unauthorized access to git repositories. This includes reviewing system inventory, understanding deployment configurations, and coordinating with relevant security teams.

Technical summary

The CVE-2026-56623 vulnerability is caused by inadequate path validation in Apache MINA SSHD component sshd-git on Windows. Specifically, the fix for CVE-2026-48827 in Apache MINA SSHD 2.18.0 and 3.0.0-M4 was incomplete for Windows environments. This allows authenticated remote users to bypass restrictions and access git repositories outside the intended server-side root directory. The issue is resolved in Apache MINA SSHD 2.19.0 and 3.0.0-M5. Affected applications are those using org.apache.sshd:sshd-git on Windows.

Defensive priority

High

Recommended defensive actions

• Upgrade to Apache MINA SSHD 2.19.0 or 3.0.0-M5
• Review and adjust path validation mechanisms
• Monitor for suspicious git repository access
• Implement compensating controls for git server security
• Review affected system inventory for Apache MINA SSHD component sshd-git on Windows
• Plan and schedule updates through normal change control for exposed systems
• Track exceptions and retest remediated assets for CVE-2026-56623

Evidence notes

The CVE record was published on 2026-07-20T21:16:48.947Z and was last modified on 2026-07-27T13:50:42.327Z. The NVD entry is currently Analyzed. This issue is caused by partly ineffective path validation for CVE-2026-48827 in Apache MINA SSHD 2.18.0 and 3.0.0-M4 on Windows. Developers should verify if their applications use org.apache.sshd:sshd-git and run on Windows. Evidence is limited to public CVE and NVD information.

Official resources