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Apache MINA SSHD: Repeated-publickey policy bypass on server

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-93994

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-93994

Apache MINA SSHD

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache MINA SSHD",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.20.0",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "3.0.0-M1",
        "lessThan": "3.0.0-M6",
        "versionType": "maven"
      }
    ],
    "packageURL": "pkg:maven/org.apache.sshd/sshd-core",
    "packageName": "org.apache.sshd:sshd-core",
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-93994

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#4413 · Revision 1
Added to Heist Feed
Publisher date
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