High [CVE-2026-56624] Improper certificate validation in Apache MINA SSHD (server-side)
This high-severity Apache Software Foundation advisory covers CVE-2026-56624 affecting Apache MINA SSHD.
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Summary
Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH.
As a result it was possible that a user could authenticate with such a certificate that included a force-command option but still was able to execute other commands. What other command exactly would be available to the user depends on the implementation of the server.
This issue is fixed in Apache MINA SSHD 2.19.0 and 3.0.0-M5. Applications are advised to upgrade to these versions.
The fix rejects OpenSSH user certificates that include these options, since Apache MINA SSHD implements neither force-command nor sk-*-cert-v01@openssh.com user certificates (which are the only ones for which verify-required would make sense).
- Apache MINA SSHD 2.0.0 through 2.18.0
- Apache MINA SSHD 3.0.0-M1 through 3.0.0-M4
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 2.19.0
- 3.0.0
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Applications are advised to upgrade to these versions.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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