{"id":"CVE-2026-93994","revision":"7a3a72dc841f41bd8d47400970ee3a61","records":[{"revision":"7a3a72dc841f41bd8d47400970ee3a61","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93994","aliases":[],"title":"Apache MINA SSHD: Repeated-publickey policy bypass on server","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.\n\n\n\n\nIn 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.\n\n\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue.","state":0,"publishedAt":"2026-09-30T09:45:32.561+00:00","modifiedAt":"2026-09-30T14:29:38.124+00:00","affected":[{"ecosystem":"https://repo.maven.apache.org/maven2","name":"org.apache.sshd:sshd-core","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"product\": \"Apache MINA SSHD\",\n                    \"packageURL\": \"pkg:maven/org.apache.sshd/sshd-core\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.20.0\",\n                            \"versionType\": \"maven\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"3.0.0-M1\",\n                            \"lessThan\": \"3.0.0-M6\",\n                            \"versionType\": \"maven\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"collectionURL\": \"https://repo.maven.apache.org/maven2\",\n                    \"packageName\": \"org.apache.sshd:sshd-core\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":8.1,"severity":"HIGH"}],"references":["https://lists.apache.org/thread.html/9t3vsm8rnvwdv9779mlg1lq2fbwojdwp"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93994","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93994","identifiers":["CVE-2026-93994"]},"retained":false,"historicalAffected":[]}],"coverage":[]}