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Java CVE-2026-56624

| EUVDEUVD-2026-46103 HIGH
Improper Certificate Validation (CWE-295)
2026-07-20 apache GHSA-j262-jh5j-p4fw
Apache Java Information Disclosure SSH Red Hat Apache Mina Sshd Apache Software Foundation
7.3
CVSS 3.1 · Vendor: apache
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Severity by source

Vendor (apache) PRIMARY
7.3 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
SUSE
HIGH
qualitative
Red Hat
7.3 HIGH
qualitative

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
Analysis Generated
Jul 20, 2026 - 21:32 vuln.today
Severity Changed
Jul 20, 2026 - 21:22 NVD
MEDIUM HIGH
CVSS changed
Jul 20, 2026 - 21:22 NVD
7.3 (MEDIUM) 7.3 (HIGH)
CVE Published
Jul 20, 2026 - 20:28 cve.org
HIGH 7.3

DescriptionCVE.org

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).

Articles & Coverage 4

News 4 New Java Vulnerabilities - 4 High Severity Patched Jul 21, 2026 News 6 New Apache Vulnerabilities - 6 High Severity, No POC Available Jul 21, 2026 News 4 New Java Vulnerabilities - 4 High Severity Jul 20, 2026 News 6 New Apache Vulnerabilities - 6 High Severity Jul 20, 2026

AnalysisAI

Command-restriction bypass in Apache MINA SSHD (server-side) lets a user who authenticates with an OpenSSH user certificate carrying a force-command directive execute arbitrary commands instead of the single restricted command the certificate authority intended. The server accepts and honors such certificates but silently ignores the force-command and verify-required options, breaking the security model that certificate issuers rely on to constrain principals. No public exploit identified at time of analysis and it is not listed in CISA KEV, but the flaw is confirmed and fixed by the Apache Software Foundation in versions 2.19.0 and 3.0.0-M5.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

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CVE-2026-56624 vulnerability details – vuln.today
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