{"id":"CVE-2026-94029","aliases":["DEBIAN-CVE-2026-94029","EUVD-2026-89731","GHSA-fj5v-qh2p-6v8f","SUSE-SU-2026:4622-1","UBUNTU-CVE-2026-94029","openSUSE-SU-2026:11940-1"],"status":"published","title":"Apache MINA SSHD: Memory exhaustion in SFTP v6 check-file-name/check-file-handle extension","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.\n\n\n\n\nUsing a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00321,"percentile":0.25396,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-09-30T09:35:51Z","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":"mina","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-11"]},{"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":"mina","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-11","1.1.7.dfsg-12"]},{"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:22.04:LTS","package":"mina","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13"]},{"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:24.04:LTS","package":"mina","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13","1.1.7.dfsg-13ubuntu1"]},{"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/ytbl4rwby62xl7llm3wp7k975wwdx99t","tags":["vendor-advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/29/37"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94029"},{"url":"https://github.com/advisories/GHSA-fj5v-qh2p-6v8f"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-94029","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-2026-94029","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-94029","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/09/29/37","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-94029","title":"Apache MINA SSHD: Memory exhaustion in SFTP v6 check-file-name/check-file-handle extension","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.\n\n\n\n\nUsing a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T09:35:51.711Z","modified":"2026-09-30T19:42:56.102Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:19:53.786088Z"}],"euvd":[{"id":"EUVD-2026-89731","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.\n\n\n\n\nUsing a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T09:35:51Z","modified":"2026-09-30T19:42:56Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T17:27:47.733217Z"}],"ghsa":[{"id":"GHSA-fj5v-qh2p-6v8f","title":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5,...","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.\n\n\n\n\nUsing a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T12:35:16Z","modified":"2026-09-30T12:35:21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-94029","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.\n\n\n\n\nUsing a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.\n\n\n\n\nUsers are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T10:17:18.01Z","modified":"2026-09-30T20:17:37.383Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"DEBIAN-CVE-2026-94029","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH.     Using a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server.     Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T10:17:18.01Z","modified":"2026-11-10T04:00:10.812338312Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-10T04:22:10.004764Z"},{"id":"UBUNTU-CVE-2026-94029","description":"Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH. Using a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.","status":"published","published":"2026-09-30T10:17:00Z","modified":"2026-10-17T13:01:18.65809254Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"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"}]}}