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High, CVSS 8.6

SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin

GHSA-4r66-7rcv-x46x

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
    <= 0.0.0-20251202123337-6ef83b42c7ce
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Summary Siyuan is vulnerable to RCE. The issue stems from a "Zip Slip" vulnerability during zip file extraction, combined with the ability to overwrite system executables and subsequently trigger their execution. Steps to reproduce 1. Authenticate 2. Create zip slip payload with path traversal entry ../../../../opt/siyuan/startup.sh. startup.sh contains malicious code like: 3. Upload zip to workspace via /api/file/putFile 4. Extract zip via /api/archive/unzip, overwrites the existing executable startup.sh while maintaining the +x permission 5. Trigger execution by calling /api/setting/setExport with pandocBin=/opt/siyuan/startup.sh. This calls IsValidPandocBin() which executes startup.sh --version that outputs "pandoc 3.1.0" and executes any arbitrary malicious code

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

    Published from ghsa record GHSA-4r66-7rcv-x46x

Agent brief

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# Patch Next advisory brief: GHSA-4r66-7rcv-x46x

Advisory: SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin
IDs: GHSA-4r66-7rcv-x46x
Record: https://patchnext.com/advisories/ghsa-4r66-7rcv-x46x (revision 1, source checked 26 Oct 2026, 15:13 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
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 <= 0.0.0-20251202123337-6ef83b42c7ce

## 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-4r66-7rcv-x46x (GitHub-reviewed advisory GHSA-4r66-7rcv-x46x lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <=0.0.0-20251202123337-6ef83b42c7ce)

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