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Critical, CVSS 9.8

SiYuan has directory traversal within its publishing service

CVE-2026-33670GHSA-xmw9-6r43-x9ww

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go github.com/siyuan-note/siyuan/kernel

    Affected
    <= 0.0.0-20260317012524-fe4523fff2c8
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2026-33670: 0.67% estimated exploitation activity in the next 30 days; percentile 52.13 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Details The /api/file/readDir interface was used to traverse and retrieve the file names of all documents under a notebook. PoC Impact Directory traversal vulnerability: The entire directory structure of a notebook could be obtained, and then a file reading vulnerability could be exploited to achieve arbitrary document reading. 资源文件夹 <img width="943" height="794" alt="image" src="https://github.com/user-attachments/assets/c97fcc42-183e-4c83-8a27-cf99bf805038" / 插件文件夹 <img width="826" height="921" alt="image" src="https://github.com/user-attachments/assets/925d4512-e4c0-4b3b-bf96-5639ec572705" / conf文件夹 <img width="730" height="834" alt="image" src="https://github.com/user-attachments/assets/2a0c23b9-2d87-4421-977d-687f47726741" /

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-xmw9-6r43-x9ww

Agent brief

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# Patch Next advisory brief: CVE-2026-33670

Advisory: SiYuan has directory traversal within its publishing service
IDs: CVE-2026-33670, GHSA-xmw9-6r43-x9ww
Record: https://patchnext.com/advisories/cve-2026-33670 (revision 1, source checked 26 Oct 2026, 15:18 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siyuan-note/siyuan/kernel: affected <= 0.0.0-20260317012524-fe4523fff2c8

## Suggested inspection (read-only)
- Go github.com/siyuan-note/siyuan/kernel: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/siyuan-note/siyuan/kernel.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xmw9-6r43-x9ww (GitHub-reviewed advisory GHSA-xmw9-6r43-x9ww lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <=0.0.0-20260317012524-fe4523fff2c8)

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