CVE-2026-93994

Published: Set 30, 2026 Last Modified: Set 30, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none

Description

AI Translation Available

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.

304

Missing Critical Step in Authentication

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Integrity Confidentiality
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
All platforms may be affected
View CWE Details
http://www.openwall.com/lists/oss-security/2026/09/29/33
http://www.openwall.com/lists/oss-security/2026/09/29/33
https://lists.apache.org/thread.html/9t3vsm8rnvwdv9779mlg1l…
https://lists.apache.org/thread.html/9t3vsm8rnvwdv9779mlg1lq2fbwojdwp