Apache MINA SSHD: Repeated-publickey policy bypass on server (CVE-2026-93994) | HOL Guard CVE

High · CVSS 8.1CVE-2026-93994

Apache MINA SSHD: Repeated-publickey policy bypass on server

Answer in brief

CVE-2026-93994 records a High severity (CVSS 8.1) vulnerability in Apache MINA SSHD: Repeated-publickey policy bypass on server. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/org.apache.sshd:sshd-core (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/org.apache.sshd:sshd-core (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/org.apache.sshd:sshd-coregeneric	>=0 <2.20.0 \|\| >=3.0.0-M1 <3.0.0-M6	2.20.0, 3.0.0-M6

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/org.apache.sshd:sshd-core.
Review the reported fix. Update Apache Software Foundation/org.apache.sshd:sshd-core to 2.20.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.