{"id":"CVE-2026-35025","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-35025","summary":"ProFTPD ACL Bypass via /proc/self/root Path Prefix in RNFR","details":"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.","published":"2026-06-24T13:21:42.281Z","modified":"2026-08-15T04:25:19.146780170Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://www.proftpd.org/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35025.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35025"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/proftpd-acl-bypass-via-proc-self-root-path-prefix-in-rnfr"},{"type":"PACKAGE","url":"https://github.com/proftpd/proftpd"},{"type":"ARTICLE","url":"https://github.com/proftpd/proftpd/issues/2170"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-15T04:25:19.146780170Z"}}