{"id":"CVE-2026-94029","revision":"7ed29d5dee614f8884024637dc70fea7","records":[{"revision":"7ed29d5dee614f8884024637dc70fea7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-94029","aliases":[],"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.\u00A0Apache 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\u00A0(possibly sparse)\u00A0file 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.","state":0,"publishedAt":"2026-09-30T09:35:51.711+00:00","modifiedAt":"2026-09-30T19:42:56.102+00:00","affected":[{"ecosystem":"https://repo.maven.apache.org/maven2","name":"org.apache.sshd:sshd-sftp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"product\": \"Apache MINA SSHD\",\n                    \"packageURL\": \"pkg:maven/org.apache.sshd/sshd-sftp\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"1.0.0\",\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-sftp\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://lists.apache.org/thread.html/ytbl4rwby62xl7llm3wp7k975wwdx99t"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-94029","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-94029","identifiers":["CVE-2026-94029"]},"retained":false,"historicalAffected":[]}],"coverage":[]}