Missing Critical Step in Authentication Affecting libmina-sshd-java package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.32% (23rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBMINASSHDJAVA-20360707
  • published1 Oct 2026
  • disclosed30 Sept 2026

Introduced: 30 Sep 2026

NewCVE-2026-93994  (opens in a new tab)
CWE-304  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest libmina-sshd-java.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libmina-sshd-java package and not the libmina-sshd-java package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1