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TI-2026-63253 Aliases CVE-2026-93994GHSA-qc4p-9828-mv83

Apache MINA SSHD: Repeated-publickey policy bypass on server

Priority LOW 37CWE-304Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 2 fixed, 7 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Apache MINA SSHD is a Java library for client-side and server-side SSH. SSH servers can be configured to require multi-authentication schemes, for instance two different public keys, not just one. In OpenSSH, this would be done by setting in sshd_config AuthenticationMethods "publickey,publickey". Apache MINA SSHD provides an equivalent configuration mechanism. In Apache MINA SSHD versions up to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 the server code in component sshd-core does not enforce that the two public keys presented are different. A user can thus successfully authenticate with only one of the two key pairs required by presenting this single key twice. This is a partial authentication bypass. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00303 23rd percentileScored 2026-11-07
Fix Partial Apache MINA SSHD (Apache Software Foundation): 2.20.0, 3.0.0-M6Red Hat: 2 advisoriesRed Hat: 2 fixed, 7 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache MINA SSHDbefore 2.20.0; 3.0.0-M1 to before 3.0.0-M62.20.0, 3.0.0-M6Patch availableCNA
  • Apache MINA SSHD VendorApache Affected before 2.20.0; 3.0.0-M1 to before 3.0.0-M6 Fixed in 2.20.0, 3.0.0-M6 Patch available CNA

Remediation

  • Fix · CNA Apache MINA SSHD (Apache Software Foundation) Fixed in 2.20.0, 3.0.0-M6

Red Hat 2 advisories

  • RHSA-2026:83670 Released 2026-10-15 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.4.GA)
    • Red Hat Build of Apache Camel 3.33.4.redhat com.fasterxml.jackson.core.jackson-core-2.21.7.redhat-00001.jar, com.fasterxml.jackson.core.jackson-databind-2.21.7.redhat-00001.jar, io.micrometer.micrometer-core-1.16.7.redhat-00002.jar +14
  • RHSA-2026:71541 Released 2026-09-24 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images maven3.9-3.9.16-0.3.hum1@noarch@public-hummingbird-aarch64-rpms, maven3.9-3.9.16-0.3.hum1@noarch@public-hummingbird-x86_64-rpms, maven3.9-3.9.16-0.3.hum1@src +2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache MINA SSHD 2.20.0, 3.0.0-M6

    8 records Highest priority Priority MEDIUM 3 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-63290 Apache MINA SSHD: LDAP injection in sshd-ldapPriority MEDIUM 47
    • TI-2026-63289 Apache MINA SSHD: LDAP password authentication ineffectivePriority MEDIUM 47
    • TI-2026-53907 Apache MINA SSHD: Asynchronous authentication can bypass signature verificationPriority MEDIUM 47
    Show all 8 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift Developer Tools and ServicesAffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Application Platform 8AffectedNo fix yet
Red Hat Single Sign-On 7AffectedNo fix planned: Will not fix
Red Hat build of Apache Camel 4 for Quarkus 3AffectedNo fix yet
Red Hat build of Apache Camel for Spring Boot 4AffectedNo fix yet
Red Hat Build of Apache Camel 3.33.4.redhatFixed RHSA-2026:83670
Red Hat Hardened ImagesFixed RHSA-2026:71541
Not affected: 6 products
  • Red Hat Build of Apache Camel 3.33.4.redhat
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Fuse 7
  • Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93994
  2. 2026-10-03 Alias added: GHSA-qc4p-9828-mv83
  3. 2026-10-06 Affected versions changed · Red Hat
  4. 2026-10-16 Affected versions changed · Red Hat
  5. 2026-11-06 Fix available: Red Hat Build of Apache Camel 3.33.4.redhat · Red Hat
  6. 2026-11-06 Fix available: RHSA-2026:83670 · Red Hat

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences