{"id":"CVE-2026-35025","state":"PUBLISHED","title":"ProFTPD ACL Bypass via /proc/self/root Path Prefix in RNFR","description":"ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers can exploit the unresolved symlink components in dir_canonical_path() to cause dir_check() to perform lexical path comparisons that match no configured Directory block, enabling rename operations on files in DenyAll-protected directories and subsequent retrieval of those files. Mitigation: Sessions configured with DefaultRoot (chroot) are not affected, as chroot changes the directory to which /proc/self/root resolves.","publishedAt":"2026-06-24T13:21:42.281Z","updatedAt":"2026-07-14T20:00:11.517Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["ProFTPD Project ProFTPD"],"affected":[{"vendor":"ProFTPD Project","product":"ProFTPD","packageURL":"pkg:github/proftpd/proftpd","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.3.9b","versionType":"custom"},{"version":"0","status":"affected","lessThanOrEqual":"1.3.10rc2","versionType":"custom"}],"repo":"https://github.com/proftpd/proftpd"}],"references":["https://github.com/proftpd/proftpd/issues/2170","http://www.proftpd.org/","https://www.vulncheck.com/advisories/proftpd-acl-bypass-via-proc-self-root-path-prefix-in-rnfr"],"weaknesses":["CWE-59"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35025.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35025","state":"PUBLISHED","datePublished":"2026-06-24T13:21:42.281Z","dateUpdated":"2026-07-14T20:00:11.517Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-03-31T20:40:15.618Z"},"containers":{"cna":{"title":"ProFTPD ACL Bypass via /proc/self/root Path Prefix in RNFR","descriptions":[{"lang":"en","value":"ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. 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