Description
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-*-cert-v01@openssh.com user certificates (which are the only ones for which verify-required would make sense).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache MINA SSHD | 2.0.0 – ≤ 2.18.0, 3.0.0-M1 – ≤ 3.0.0-M4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libmina-sshd-java | 2.19.0-1 | — |
| Debian 13 | libmina-sshd-java | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mina2 | No fix yet | — |
| Ubuntu 24.04 LTS | mina | No fix yet | — |
| Ubuntu 22.04 LTS | mina | No fix yet | — |
| Ubuntu 20.04 LTS | mina +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mina +1 | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | mina +1 | No fix yet | — |
| Ubuntu Pro 26.04 LTS | mina2 | No fix yet | — |
| Ubuntu Pro 24.04 LTS | mina2 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | mina2 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLES 15 SP6 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLES 15 SP5 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLES 15 SP4 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLES for SAP 15 SP5 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLES for SAP 15 SP4 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLE HPC 15 SP5 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
| SLE HPC 15 SP4 | apache-sshd | 2.19.0-150200.5.16.1 | SUSE-SU-2026:3339-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache-sshd | 2.19.0-2.1 | openSUSE-SU-2026:11327-1 |
Advisories 4
- WID-SEC-2026-4056 Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-2834 Red Hat Build of Apache Camel for Quarkus (sshd-core, libthrift, org.hl7.fhir.utilities): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- SUSE-SU-2026:3339-1 Security update for apache-sshd SUSE / openSUSE Security Updates · Jul 28, 2026
- openSUSE-SU-2026:11327-1 apache-sshd-2.19.0-2.1 on GA media SUSE / openSUSE Security Updates · Jul 23, 2026
References
- https://lists.apache.org/thread/o4c2jml522j3z80gbryqzc2f1253ltp6 vendor-advisory