---
id: "CVE-2026-112343"
kind: "vulnerability"
aliases: ["CVE-2026-112343"]
title: "Syncplify Server: SFTP users bypass folder permissions via case and 8.3 names"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "self-hosted", "sftp", "syncplify-server", "windows"]
not_affected_if: ["no-path-overrides", "no-sftp-users", "version-8.8.0-or-later"]
published_at: "2026-10-26T16:17:13+00:00"
first_seen_at: "2026-10-26T16:31:01+00:00"
updated_at: "2026-10-26T16:32:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112343", "first_seen_at": "2026-10-26T16:31:01+00:00"}]
---

# Syncplify Server: SFTP users bypass folder permissions via case and 8.3 names

Syncplify Server before 8.8.0 lets an authenticated SFTP user evade per-path permission overrides by writing a protected directory name in different capitalization or as its 8.3 short name. The bypass allows uploads and downloads that the configured override is meant to block.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Syncplify Server version in its admin console or install directory; the sources do not give a command.
- Review per-path permission overrides for protected folders and confirm whether any SFTP accounts can reach them.

## Fix

- Upgrade Syncplify Server to `8.8.0` or later.
- Unknown whether a configuration workaround exists; the sources do not say.

## Timeline

- 2026-10-26T16:31:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112343

## From the sources

Syncplify Server! before 8.8.0 contains an access control bypass vulnerability that allows authenticated SFTP users to evade per-path permission overrides by exploiting case-insensitive filesystem path resolution and 8.3 short names. Attackers can address a protected directory using alternate capitalization or its 8.3 short name to perform file uploads and downloads that the configured override is intended to deny, resulting in unauthorized file access.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_