CVE-2026-56624: CWE-295 Improper Certificate Validation in Apache Software Foundation Apache MINA SSHD
Apache MINA SSHD versions 2.0.0 through 3.0.0-M1 contain a vulnerability in server-side OpenSSH user certificate validation. The server did not properly check or validate unsupported force-command or verify-required options embedded in user certificates. This allowed a user to authenticate with a certificate containing a force-command option but still execute other commands, depending on server implementation. The issue is fixed in versions 2.19.0 and 3.0.0-M5 by rejecting such certificates.
AI Analysis
Technical Summary
CVE-2026-56624 describes an improper certificate validation vulnerability (CWE-295) in Apache MINA SSHD server-side OpenSSH user certificate authentication. The server failed to check for unsupported force-command or verify-required options in user certificates, allowing authenticated users to bypass intended command restrictions. The vulnerability affects Apache MINA SSHD versions from 2.0.0 up to and including 3.0.0-M1. The fix, introduced in versions 2.19.0 and 3.0.0-M5, rejects OpenSSH user certificates containing these unsupported options, as the server does not implement force-command or sk-*[email protected] certificates.
Potential Impact
An attacker with a user certificate containing a force-command option could authenticate to an Apache MINA SSHD server and execute commands other than the forced command intended by the certificate. This could lead to unauthorized command execution with the privileges of the authenticated user. The confidentiality and integrity of the system could be compromised. Availability impact is not indicated.
Mitigation Recommendations
Applications using Apache MINA SSHD should upgrade to version 2.19.0 or later, or 3.0.0-M5 or later, where the vulnerability is fixed by rejecting OpenSSH user certificates with unsupported force-command or verify-required options. No other mitigation is specified. Patch status is not explicitly stated but upgrading to these fixed versions is advised.
CVE-2026-56624: CWE-295 Improper Certificate Validation in Apache Software Foundation Apache MINA SSHD
Description
Apache MINA SSHD versions 2.0.0 through 3.0.0-M1 contain a vulnerability in server-side OpenSSH user certificate validation. The server did not properly check or validate unsupported force-command or verify-required options embedded in user certificates. This allowed a user to authenticate with a certificate containing a force-command option but still execute other commands, depending on server implementation. The issue is fixed in versions 2.19.0 and 3.0.0-M5 by rejecting such certificates.
CVSS v3.1
Score 7.3high
Affected software
pkg:maven/Apache Software Foundation/org.apache.sshd:sshd-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56624 describes an improper certificate validation vulnerability (CWE-295) in Apache MINA SSHD server-side OpenSSH user certificate authentication. The server failed to check for unsupported force-command or verify-required options in user certificates, allowing authenticated users to bypass intended command restrictions. The vulnerability affects Apache MINA SSHD versions from 2.0.0 up to and including 3.0.0-M1. The fix, introduced in versions 2.19.0 and 3.0.0-M5, rejects OpenSSH user certificates containing these unsupported options, as the server does not implement force-command or sk-*[email protected] certificates.
Potential Impact
An attacker with a user certificate containing a force-command option could authenticate to an Apache MINA SSHD server and execute commands other than the forced command intended by the certificate. This could lead to unauthorized command execution with the privileges of the authenticated user. The confidentiality and integrity of the system could be compromised. Availability impact is not indicated.
Mitigation Recommendations
Applications using Apache MINA SSHD should upgrade to version 2.19.0 or later, or 3.0.0-M5 or later, where the vulnerability is fixed by rejecting OpenSSH user certificates with unsupported force-command or verify-required options. No other mitigation is specified. Patch status is not explicitly stated but upgrading to these fixed versions is advised.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-22T15:05:27.038Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5e8bb12a4a8d5989b8f5b6
Added to database: 07/20/2026, 20:57:21 UTC
Last enriched: 07/30/2026, 05:33:27 UTC
Last updated: 09/03/2026, 10:52:10 UTC
Views: 127
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