CVE-2026-35025

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
http://www.proftpd.org/	Product Release Notes
https://github.com/proftpd/proftpd/issues/2170	Issue Tracking Mitigation
https://www.vulncheck.com/advisories/proftpd-acl-bypass-via-proc-self-root-path-prefix-in-rnfr	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:proftpd:proftpd::::::::
	cpe:2.3:a:proftpd:proftpd:1.3.10:rc1::::::
	cpe:2.3:a:proftpd:proftpd:1.3.10:rc2::::::

History

No history.

Information

Published : 2026-06-24 14:17

Updated : 2026-07-14 21:16

NVD link : CVE-2026-35025

Mitre link : CVE-2026-35025

CVE.ORG link : CVE-2026-35025

JSON object : View

Products Affected

proftpd

proftpd

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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