{"id":"CVE-2026-119147","kind":"vulnerability","aliases":["CVE-2026-119147"],"related":[],"title":"ProFTPD: SFTP copy command lets logged-in users write to denied directories","description":"ProFTPD before 1.3.9e and 1.3.10rc5 contains an authorization bypass in the mod_sftp copy-file extension handler that skips Limit WRITE checks for new destination files. Authenticated SFTP users can copy any readable file to a new path in write-denied directories, creating files where uploads are forbidden.","summary":"ProFTPD's mod_sftp copy-file extension skips Limit WRITE checks when creating new destination files. An authenticated SFTP user can copy any readable file to a new path in a directory where uploads are forbidden.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mod_sftp","proftpd","runtime","self-hosted","sftp"],"not_affected_if":["mod_sftp-disabled","no-limit-write-rules","no-sftp-users"],"how_to_check":"- Check the installed ProFTPD version with `proftpd -v`\n- Look for `mod_sftp` in the loaded modules and for `Limit WRITE` rules in proftpd.conf","fix":"- ProFTPD before `1.3.9e` and `1.3.10rc5` are affected; move to `1.3.9e` or `1.3.10rc5` or later","status":"open","published_at":"2026-10-30T12:16:35+00:00","first_seen_at":"2026-10-30T12:30:23+00:00","triaged_at":"2026-10-30T12:33:00+00:00","updated_at":"2026-10-30T12:33:00+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-30T12:33:00Z","model":"claude-haiku-5-5","output":{"fix":"- ProFTPD before `1.3.9e` and `1.3.10rc5` are affected; move to `1.3.9e` or `1.3.10rc5` or later","reach":"network","title":"ProFTPD: SFTP copy command lets logged-in users write to denied directories","impact":"medium","summary":"ProFTPD's mod_sftp copy-file extension skips Limit WRITE checks when creating new destination files. An authenticated SFTP user can copy any readable file to a new path in a directory where uploads are forbidden.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["proftpd","mod_sftp","sftp","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"authenticated users write copied files into forbidden directories","analyst_note":"","how_to_check":"- Check the installed ProFTPD version with `proftpd -v`\n- Look for `mod_sftp` in the loaded modules and for `Limit WRITE` rules in proftpd.conf","plain_action":"","needs_analyst":false,"not_affected_if":["mod_sftp-disabled","no-sftp-users","no-limit-write-rules"],"who_is_affected":"Servers running ProFTPD before 1.3.9e or 1.3.10rc5 with mod_sftp enabled and SFTP logins for users. The risk is highest where Limit WRITE rules are used to protect directories from uploads. Systems without mod_sftp or without authenticated SFTP users are unlikely to be exposed.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000703,"input_tokens":4149,"output_tokens":576,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-119147':16A,19A '-2026':15A,18A '1.3.10':70C '1.3.9':67C 'authent':46B,94C 'author':74C 'bypass':75C 'check':39B,89C 'command':4A 'contain':72C 'copi':3A,33B,50B,81C,98C 'copy-fil':32B,80C 'creat':41B,111C 'cve':14A,17A 'deni':12A,109C 'destin':43B,92C 'directori':13A,60B,110C 'e':68C 'extens':35B,83C 'file':34B,44B,53B,82C,93C,101C,112C 'forbidden':64B,116C 'handler':84C 'host':26B 'let':5A 'limit':37B,87C 'log':7A 'logged-in':6A 'mod':20B,30B,78C 'new':42B,56B,91C,104C 'path':57B,105C 'proftpd':1A,22B,28B,65C 'rc5':71C 'readabl':52B,100C 'runtim':23B 'self':25B 'self-host':24B 'sftp':2A,21B,27B,31B,47B,79C,95C 'skip':36B,86C 'upload':62B,114C 'user':9A,48B,96C 'write':10A,38B,88C,108C 'write-deni':107C","nicknames":[],"mitigations":[],"who_affected":"Servers running ProFTPD before 1.3.9e or 1.3.10rc5 with mod_sftp enabled and SFTP logins for users. The risk is highest where Limit WRITE rules are used to protect directories from uploads. Systems without mod_sftp or without authenticated SFTP users are unlikely to be exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-30T12:16:35+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-119147","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119147","severity":null,"published_at":"2026-10-30T12:16:35+00:00","modified_at":"2026-10-30T12:16:35+00:00","first_seen_at":"2026-10-30T12:30:23+00:00","fetched_at":"2026-10-30T12:30:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}