CVE-2026-93994

high

Apache MINA SSHD is a Java library for client-side and server-side SSH.

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

8.1

8.1 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Severity source: NVD CVSS v3.1 (security@apache.org)

Timeline (UTC)

Published: 2026-09-30 10:17

Modified: 2026-09-30 16:13

NVD status: Awaiting Analysis

Last synced 2 days ago

Verified against the source API 2026-10-27 06:56 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-304

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://lists.apache.org/thread.html/9t3vsm8rnvwdv9779mlg1lq2fbwojdwp security@apache.org
http://www.openwall.com/lists/oss-security/2026/09/29/33 af854a3a-2127-422b-91ae-364da2661108

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗

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