---
title: "CVE-2026-33670: SiYuan has directory traversal within its publishing service"
url: https://erroneo.us/security/cve/CVE-2026-33670/
description: "CVE-2026-33670 (github.com/siyuan-note/siyuan/kernel (Go)): SiYuan is a personal knowledge management system. Prior to version 3.6.2, the /api/file/readDir…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-26
date_modified: 2026-03-30
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-33670"
kev: false
cvss: 9.8
epss: 0.00624
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-33670: SiYuan has directory traversal within its publishing service

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 49: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 49% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/siyuan-note/siyuan/kernel (Go) <= 0.0.0-20260317012524-fe4523fff2c8, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

SiYuan is a personal knowledge management system. Prior to version 3.6.2, the /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook. Version 3.6.2 patches the issue.

## Affected packages

- Go `github.com/siyuan-note/siyuan/kernel` <= 0.0.0-20260317012524-fe4523fff2c8 → fixed: none listed

## Affected products (CVE record)

- siyuan-note siyuan: < 3.6.2

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.62% probability of exploitation activity in the next 30 days; percentile 49.

## Sources

- [GitHub Advisory GHSA-xmw9-6r43-x9ww](https://github.com/advisories/GHSA-xmw9-6r43-x9ww)
- [CVE.org record CVE-2026-33670](https://www.cve.org/CVERecord?id=CVE-2026-33670)
- [NVD entry CVE-2026-33670](https://nvd.nist.gov/vuln/detail/CVE-2026-33670)
- [github.com](https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xmw9-6r43-x9ww)

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Source page: https://erroneo.us/security/cve/CVE-2026-33670/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt