CVE-2026-56624
published 2026-07-20CVE-2026-56624: Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH. Server-side OpenSSH…
PriorityP346high7.3CVSS 3.1
AVNACLPRLUIRSUCHIHAN
EPSS
0.17%
6.2th percentile
Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH.
Server-side OpenSSH user certificate validation during user authentication in an Apache MINA SSHD server did not check for the unsupported force-command or verify-required options that could be embedded in the certificate, nor did it validate these options. 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-*[email protected] user certificates (which are the only ones for which verify-required would make sense).
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | mina_sshd | — | — |
| apache | mina_sshd | — | — |
| apache | mina_sshd | — | — |
| apache | mina_sshd | — | — |
| apache | mina_sshd | >= 2.0.0 < 2.19.0 | 2.19.0 |
| apache_software_foundation | apache_mina_sshd | 2.0.0 – 2.18.0 | — |
| apache_software_foundation | apache_mina_sshd | 3.0.0-M1 – 3.0.0-M4 | — |
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VulDB
Apache MINA SSHD up to 2.18.0/3.0.0-M4 certificate validation
vuldb·2026-07-20·CVSS 7.3
CVE-2026-56624 [HIGH] Apache MINA SSHD up to 2.18.0/3.0.0-M4 certificate validation
A vulnerability was found in Apache MINA SSHD up to 2.18.0/3.0.0-M4 and classified as problematic. This affects an unknown function. Such manipulation leads to improper certificate validation.
This vulnerability is uniquely identified as CVE-2026-56624. The attack can be launched remotely. No exploit exists.
GHSA
Improper certificate validation in Apache MINA SSHD (server-side).
ghsa_unreviewed·2026-07-20
CVE-2026-56624 [HIGH] CWE-295 Improper certificate validation in Apache MINA SSHD (server-side).
Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java library for client-side and server-side SSH.
Server-side OpenSSH user certificate validation during user authentication in an Apache MINA SSHD server did not check for the unsupported force-command or verify-required options that could be embedded in the certificate, nor did it validate these options. 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 reje
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-07-20
Published