---
id: "CVE-2026-118680"
kind: "vulnerability"
aliases: ["CVE-2026-118680"]
title: "SiYuan: Windows path alias bypass copies API token and TLS key publicly"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "siyuan", "windows"]
not_affected_if: ["default-config"]
published_at: "2026-10-28T19:17:34+00:00"
first_seen_at: "2026-10-28T19:34:55+00:00"
updated_at: "2026-10-28T19:36:09+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118680", "first_seen_at": "2026-10-28T19:34:55+00:00"}]
---

# SiYuan: Windows path alias bypass copies API token and TLS key publicly

SiYuan 3.8.7 through 3.8.8 does not normalize Windows GLOBALROOT device-namespace paths, so its sensitive-path denylist can be bypassed. An attacker who can call importStdMd can copy the API token and TLS private key into the publicly served assets directory.

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

## How to check

- Check the installed SiYuan version in the app's About dialog or package metadata: `3.8.7` through `3.8.8` are affected.
- On Windows hosts, look for a copy of the API token or TLS private key under the SiYuan assets directory.

## Fix

- Upgrade SiYuan to a version later than `3.8.8` (fixed version unknown from the sources).
- Rotate the SiYuan API token and TLS private key if the host ran an affected version and was reachable.

## Timeline

- 2026-10-28T19:34:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118680

## From the sources

SiYuan 3.8.7 through 3.8.8 fails to normalize Windows GLOBALROOT device-namespace aliases, bypassing the IsSensitivePath denylist. Attackers can invoke importStdMd with a GLOBALROOT-prefixed path to copy the API token and TLS private key into the publicly served assets directory.

---

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