---
id: CVE-2026-119147
title: ProFTPD before 1.3.9e and 1.3.10rc5 mod_sftp Copy-File Authorization Bypass
summary: >-
  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 i…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-863
vendor: ProFTPD Project
product: ProFTPD
affected:
  - ProFTPD < 1.3.9e
  - ProFTPD >= 1.3.10rc1 < 1.3.10rc5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:06:55.706673Z'
published: '2026-10-30'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:07:16.415Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-119147'
references:
  - url: >-
      https://github.com/proftpd/proftpd/commit/b7d3de4565ae448a510feecd17b41923e44bfe16
  - url: >-
      https://github.com/proftpd/proftpd/blob/v1.3.9d/contrib/mod_sftp/fxp.c#L4748
  - url: 'https://github.com/proftpd/proftpd/releases/tag/v1.3.9e'
    label: ProFTPD v1.3.9e Release Notes
  - url: 'https://github.com/proftpd/proftpd/releases/tag/v1.3.10rc5'
    label: ProFTPD v1.3.10rc5 Release Notes
  - url: 'https://abraxaslabs.tech/research/proftpd-sftp-copy-file-write'
  - url: 'https://github.com/proftpd/proftpd'
  - url: >-
      https://www.vulncheck.com/advisories/proftpd-before-1.3-9e-and-1.3-10rc5-mod-sftp-copy-file-authorization-bypass
    label: >-
      VulnCheck Advisory: ProFTPD before 1.3.9e and 1.3.10rc5 mod_sftp Copy-File
      Authorization Bypass
tags:
  - cve.org
epss: 0.00289
epssPercentile: 0.21546
ingestedAt: '2026-11-03T10:42:03.635Z'
---

## Overview

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.

## Affected

- `ProFTPD < 1.3.9e`
- `ProFTPD >= 1.3.10rc1 < 1.3.10rc5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.