GHSA-4r66-7rcv-x46x: Github.com/siyuan note/siyuan/kernel Remote Code Execution Vulnerability

HIGH
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CWE-22
Published
Advisory Summary

GHSA-4r66-7rcv-x46x is a HIGH remote code execution vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/siyuan note/siyuan/kernel libraries in the Go ecosystem. The issue involves siyuan vulnerable to rce via zip slip and command injection via pandocbin. Remediation is available in the latest vendor maintenance releases.

GHSA-4r66-7rcv-x46x at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-4r66-7rcv-x46x
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/siyuan note/siyuan/kernel
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-4r66-7rcv-x46x

To remediate this vulnerability, upgrade all affected Github.com/siyuan note/siyuan/kernel dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/siyuan-note/siyuan/kernel fixed: Latest secure release 
Upgrade github.com/siyuan-note/siyuan/kernel to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/siyuan-note/siyuan/kernel

How to Check if You Are Affected

To determine whether your application is affected by GHSA-4r66-7rcv-x46x, inspect your project dependencies for Github.com/siyuan note/siyuan/kernel:

inspect dependencies for github.com/siyuan-note/siyuan/kernel

Analyze the terminal output to locate any version of Github.com/siyuan note/siyuan/kernel in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Github.com/siyuan note/siyuan/kernel, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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: ```bash #!/bin/sh echo 'you have been pwned' > /siyuan/workspace/data/pwned.txt echo "pandoc 3.1.0" ``` 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

GHSA-4r66-7rcv-x46x Affected Github.com/siyuan note/siyuan/kernel Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/siyuan-note/siyuan/kernel
golang/github.com/siyuan-note/siyuan/kernel
Go
≤ 0.0.0-20251202123337-6ef83b42c7ce

References

GitHub Advisory / Wiki ADVISORY
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4r66-7rcv-x46x
Github.com/siyuan note/siyuan/kernel Source Repository REPOSITORY
https://github.com/siyuan-note/siyuan

Frequently Asked Questions

What is GHSA-4r66-7rcv-x46x?
GHSA-4r66-7rcv-x46x is a security vulnerability in Github.com/siyuan note/siyuan/kernel involving SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/siyuan note/siyuan/kernel versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/siyuan-note/siyuan/kernel.
What version fixes GHSA-4r66-7rcv-x46x?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/siyuan-note/siyuan/kernel affected?
Yes, github.com/siyuan-note/siyuan/kernel is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-4r66-7rcv-x46x?
GHSA-4r66-7rcv-x46x is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Go dependencies for GHSA-4r66-7rcv-x46x?
Run the dependency tree command: 'inspect dependencies for github.com/siyuan-note/siyuan/kernel'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4r66-7rcv-x46x",
  "modified" : "2025-12-09T17:18:16Z",
  "published" : "2025-12-09T17:18:16Z",
  "aliases" : [ ],
  "summary" : "SiYuan vulnerable to RCE via zip slip and Command Injection via PandocBin",
  "details" : "### Summary\nSiyuan 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.\n\n### Steps to reproduce\n1. Authenticate\n2. Create zip slip payload with path traversal entry `../../../../opt/siyuan/startup.sh`. startup.sh contains malicious code like:\n```bash\n#!/bin/sh\necho 'you have been pwned' > /siyuan/workspace/data/pwned.txt\necho \"pandoc 3.1.0\"\n```\n3. Upload zip to workspace via `/api/file/putFile`\n4. Extract zip via `/api/archive/unzip`, overwrites the existing executable `startup.sh` while maintaining the +x permission\n5. 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",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/siyuan-note/siyuan/kernel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.0.0-20251202123337-6ef83b42c7ce"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-4r66-7rcv-x46x"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/siyuan-note/siyuan"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-09T17:18:16Z",
    "nvd_published_at" : null
  }
}