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Fencer Vulns
high 7.3

CVE-2026-56624 json

Apache MINA SSHD: SSH certificate options lack validations

published 2026-07-20 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-46103

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

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).

Patch / fix

  • org.apache.sshd sshd-core 2.19.0, 3.0.0-m5
  • apache-sshd SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.19.0-150200.5.16.1

suse advisories SUSE-SU-2026:3339-1

  • apache-sshd openSUSE Tumbleweed 2.19.0-2.1

opensuse advisories openSUSE-SU-2026:11327-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-56624 updated cvss 7.3

org.apache.sshd/sshd-core: Apache MINA SSHD: Unauthorized command execution due to improper certificate validation

  • Red Hat OpenShift Developer Tools and Services jenkins, jenkins-2-plugins Red Hat build of Apache Camel - HawtIO 4 sshd-core Red Hat build of Apache Camel 4 for Quarkus 3 sshd-core
    affected: no fix available
  • Red Hat Single Sign-On 7 sshd-core
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-rhel8 1786628667
    fixed: vendor fix RHSA-2026:60247
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-rhel8 1786628681
    fixed: vendor fix RHSA-2026:60249
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-rhel8 1786533561
    fixed: vendor fix RHSA-2026:60248
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-rhel8 1786533565
    fixed: vendor fix RHSA-2026:60239
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-rhel9 1787125166
    fixed: vendor fix RHSA-2026:60251
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-rhel9 1787124635
    fixed: vendor fix RHSA-2026:60246
show 14 more
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-rhel9 1787125069
    fixed: vendor fix RHSA-2026:60250
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-rhel9 1787124632
    fixed: vendor fix RHSA-2026:60252
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-rhel9 1787124925
    fixed: vendor fix RHSA-2026:60259
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-rhel9 1787125311
    fixed: vendor fix RHSA-2026:60254
  • Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-rhel9 1787124779
    fixed: vendor fix RHSA-2026:60256
  • Red Hat Build of Apache Camel 4.18 for Quarkus 3.33
    fixed: vendor fix RHSA-2026:54776
  • Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16
    fixed: vendor fix RHSA-2026:71675
  • Red Hat build of Quarkus 3.27.5
    fixed: vendor fix RHSA-2026:53643
  • Red Hat build of Quarkus 3.33.3
    fixed: vendor fix RHSA-2026:51653
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix RHSA-2026:95887
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-agent-base-rhel8 1786628706 Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-agent-base-rhel8 1786628711 Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-agent-base-rhel8 1786628748 Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-agent-base-rhel8 1786628726 Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-agent-base-rhel9 1787124634 Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-agent-base-rhel9 1787124986
    +6 more products
    Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-agent-base-rhel9 1787124633 Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-agent-base-rhel9 1787124663 Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-agent-base-rhel9 1787125493 Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-agent-base-rhel9 1787125679 Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-agent-base-rhel9 1787125563 Red Hat Enterprise Linux 7 maven-wagon, maven-wagon-scm, maven-wagon-javadoc, maven-wagon-provider-test
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 maven-wagon, maven-wagon-ftp, maven-wagon-file, maven-wagon-http, maven-wagon-javadoc, maven-wagon-providers, +3 more Red Hat Enterprise Linux 9 maven-wagon, maven-wagon-javadoc
    not affected: component not present
  • Red Hat JBoss Enterprise Application Platform 7 sshd-core
    not affected: vulnerable code not present
  • Red Hat JBoss Enterprise Application Platform Expansion Pack sshd-core
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected products

  • Apache Software Foundation Apache MINA SSHD

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.