Auth bypass in Proftpd Project
CVE-2026-119147
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/proftpd/proftpd/commit/b7d3de4565ae448a510feecd17b41923e44bfe16 (patch)
- github.com/proftpd/proftpd/blob/v1.3.9d/contrib/mod_sftp/fxp.c (technical-description)
- github.com/proftpd/proftpd/releases/tag/v1.3.9e (release-notes)
- github.com/proftpd/proftpd/releases/tag/v1.3.10rc5 (release-notes)
- abraxaslabs.tech/research/proftpd-sftp-copy-file-write (third-party-advisory)
- github.com/proftpd/proftpd (product)
- www.vulncheck.com/advisories/proftpd-before-1.3-9e-and-1.3-10rc5-mod-sftp-copy-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119147?
- CVE-2026-119147 is a medium-severity vulnerability in Proftpd Project, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-10-30.
- How severe is CVE-2026-119147?
- Medium severity. CVSS v3 base score is 4.3 out of 10.