{"id":"CVE-2026-77185","aliases":["DEBIAN-CVE-2026-77185","EUVD-2026-89759","GHSA-v223-2p4c-wp64","SUSE-SU-2026:4622-1","UBUNTU-CVE-2026-77185","openSUSE-SU-2026:11940-1"],"status":"published","title":"Apache MINA SSHD: Asynchronous authentication can bypass signature verification","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.\n\n\n\n\nApache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.\n\n\n\n\nUsers are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00403,"percentile":0.34846,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-305"],"published":"2026-09-30T09:47:03Z","modified":"2026-11-10T04:00:10Z","fixes":[{"ecosystem":"Debian:14","package":"libmina-sshd-java","fixed_in":["2.20.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"libmina-sshd-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.2-2","2.13.2-3","2.19.0-1","2.20.1-1"]},{"source":"osv","ecosystem":"Debian:14","package":"libmina-sshd-java","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.1-1"}]}],"versions":["2.13.2-2","2.13.2-3","2.19.0-1"]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Development Tools 15 SP7","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP4-LTSS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP5-LTSS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 15 SP6-LTSS","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP4","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP5","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP6","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-150200.5.19.1"}]}],"bundled":8},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.7+dfsg-2","2.0.9-1","2.0.9-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.16-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mina","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.19-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.4-2","2.1.5-1","2.1.5-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-3","2.2.1-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-4","2.2.1-4ubuntu1","2.2.9-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"mina2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-4","2.2.1-4ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"apache-sshd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.20.0-1.1"}]}],"bundled":8}],"products":[{"vendor":"apache software foundation","product":"apache mina sshd"}],"references":[{"url":"https://lists.apache.org/thread.html/t8pn812yq8ndokxyfxztg8tovov1284n","tags":["vendor-advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/29/32"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77185"},{"url":"https://github.com/advisories/GHSA-v223-2p4c-wp64"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-77185","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20264622-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1283344","tags":["report"]},{"url":"https://bugzilla.suse.com/1283345","tags":["report"]},{"url":"https://bugzilla.suse.com/1283346","tags":["report"]},{"url":"https://bugzilla.suse.com/1283347","tags":["report"]},{"url":"https://bugzilla.suse.com/1283348","tags":["report"]},{"url":"https://bugzilla.suse.com/1283350","tags":["report"]},{"url":"https://bugzilla.suse.com/1283352","tags":["report"]},{"url":"https://bugzilla.suse.com/1283357","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-77185","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-93994","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-93995","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-93996","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-94002","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-94029","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-94052","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-94053","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-77185","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-77185","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/29/32","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-77185","title":"Apache MINA SSHD: Asynchronous authentication can bypass signature verification","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.\n\n\n\n\nApache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.\n\n\n\n\nUsers are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T09:47:03.852Z","modified":"2026-09-30T16:52:13.274Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:20:15.712761Z"}],"euvd":[{"id":"EUVD-2026-89759","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.\n\n\n\n\nApache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.\n\n\n\n\nUsers are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T09:47:03Z","modified":"2026-09-30T16:52:13Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T17:27:48.536397Z"}],"ghsa":[{"id":"GHSA-v223-2p4c-wp64","title":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3...","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.\n\n\n\n\nApache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.\n\n\n\n\nUsers are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T12:35:15Z","modified":"2026-09-30T12:35:16Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-77185","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.\n\n\n\n\nApache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.\n\n\n\n\nUsers are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T10:17:17.123Z","modified":"2026-09-30T17:16:49.877Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-305"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"DEBIAN-CVE-2026-77185","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server.     Apache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result.     Users are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T10:17:17.123Z","modified":"2026-11-10T04:00:10.709725154Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-10T04:22:10.004764Z"},{"id":"UBUNTU-CVE-2026-77185","description":"Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server. Apache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform \"asynchronous authentication\" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result. Users are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this \"asynchronous authentication\" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.","status":"published","published":"2026-09-30T10:17:00Z","modified":"2026-11-05T11:47:34.605835628Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-05T13:30:00.949926Z"},{"id":"openSUSE-SU-2026:11940-1","title":"apache-sshd-2.20.0-1.1 on GA media","description":"These are all security issues fixed in the apache-sshd-2.20.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-01T00:00:00Z","modified":"2026-10-02T18:23:14.062264763Z","updated_at":"2026-11-02T16:58:40.245664Z"},{"id":"SUSE-SU-2026:4622-1","title":"Security update for apache-sshd","description":"This update for apache-sshd fixes the following issues:\n\n- CVE-2026-77185: Asynchronous authentication can bypass signature verification (bsc#1283357).\n- CVE-2026-93994: Repeated-publickey policy bypass on server (bsc#1283352).\n- CVE-2026-93995: Remote execution of JGit 'archive -o=file.zip' can write file on the server (bsc#1283350).\n- CVE-2026-93996: Memory exhaustion DoS via unbounded SCP command line read (bsc#1283348).\n- CVE-2026-94002: Memory exhaustion in SFTP client via unsolicited SFTP replies (bsc#1283347).\n- CVE-2026-94029: Memory exhaustion in SFTP v6 check-file-name/check-file-handle extension (bsc#1283346).\n- CVE-2026-94052: LDAP password authentication ineffective (bsc#1283345).\n- CVE-2026-94053: LDAP injection in sshd-ldap (bsc#1283344).\n\nChanges for apache-sshd:\n\n- Update to upstream version 2.20.0:\n + GH-656 ChannelPipedInputStream: shrink buffer when emptied\n + GH-906 Fix finding a signature factory for BC ed25519 keys\n + GH-911 Fix server-side SOCKS5 proxy for fragmented and\n pipelined CONNECT requests\n + Allow asynchronous authentication only for password and\n keyboard-interactive authentication schemes\n + Fix authentication requiring multiple public keys\n (server-side)\n + Better argument handling in sshd-git\n + More checks in authentication (server-side)\n + Better SCP command handling\n + SFTP client: simplify response message handling\n + Fix check-file-name/check-file-handle SFTP v6 extension\n + Improve LDAP authentication (sshd-ldap)\n * New Features\n + GH-905 Implement the 'from' and 'expiry-time' options in\n authorized_keys handling in public key authentication (server\n side)\n","status":"published","published":"2026-10-12T07:25:50Z","modified":"2026-10-13T10:30:04.877503172Z","updated_at":"2026-11-02T15:54:05.838224Z"}]}}