GHSA-2mmh-4rf8-7xg6: Duplicate Advisory SiYuan: Cross-boundary Content Disclosure Vulnerability

CRITICAL
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CVSS 8.6
CWE-862
Published
Advisory Summary

GHSA-2mmh-4rf8-7xg6 is a CRITICAL (CVSS 8.6) siyuan: cross-boundary content disclosure vulnerability (CWE-862: Missing Authorization) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves siyuan: cross-boundary content disclosure via getbacklinkdoc/getbackmentiondoc (publish mode): reader-reachable rendered dom of publish-forbidden docs; sibling list endpoints are filtered. Remediation is available in the latest vendor maintenance releases.

GHSA-2mmh-4rf8-7xg6 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2mmh-4rf8-7xg6
Severity CRITICAL
CVSS v3.1 Base Score 8.6
CWE Classification CWE-862: Missing Authorization
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 8.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix GHSA-2mmh-4rf8-7xg6

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

siyuan fixed: Latest secure release 
npm install siyuan@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: 

npm ls siyuan

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-2mmh-4rf8-7xg6, inspect your project dependencies using npm:

npm ls siyuan

Analyze the terminal output to locate any version of Duplicate Advisory 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: The npm ls siyuan command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Duplicate Advisory, 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

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-36v8-mpjm-8j5r. This link is maintained to preserve external references. ## Original Description SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).

GHSA-2mmh-4rf8-7xg6 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
siyuan
npm/siyuan
npm
≤ 3.7.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-36v8-mpjm-8j5r
NVD — GHSA-2mmh-4rf8-7xg6 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68586
www.vulncheck.com/advisories/siyuan-b... WEB
https://www.vulncheck.com/advisories/siyuan-before-content-disclosure-via-getbacklinkdoc

Frequently Asked Questions

What is GHSA-2mmh-4rf8-7xg6?
GHSA-2mmh-4rf8-7xg6 is a security vulnerability in Duplicate Advisory involving SiYuan: Cross-boundary content disclosure via getBacklinkDoc/getBackmentionDoc (publish mode): reader-reachable rendered DOM of publish-forbidden docs; sibling list endpoints are filtered under CWE-862: Missing Authorization.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: siyuan.
What version fixes GHSA-2mmh-4rf8-7xg6?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is siyuan affected?
Yes, siyuan is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-2mmh-4rf8-7xg6?
GHSA-2mmh-4rf8-7xg6 has a CVSS v3.1 base score of 8.6 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with GHSA-2mmh-4rf8-7xg6?
GHSA-2mmh-4rf8-7xg6 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check npm dependencies for GHSA-2mmh-4rf8-7xg6?
Run the dependency tree command: 'npm ls siyuan'. 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-2mmh-4rf8-7xg6",
  "modified" : "2026-09-03T21:21:12Z",
  "published" : "2026-08-03T15:32:47Z",
  "withdrawn" : "2026-09-03T21:21:12Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: SiYuan: Cross-boundary content disclosure via getBacklinkDoc/getBackmentionDoc (publish mode): reader-reachable rendered DOM of publish-forbidden docs; sibling list endpoints are filtered",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-36v8-mpjm-8j5r. This link is maintained to preserve external references.\n\n## Original Description\nSiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "siyuan"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.7.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-36v8-mpjm-8j5r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68586"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/siyuan-before-content-disclosure-via-getbacklinkdoc"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-03T21:21:12Z",
    "nvd_published_at" : "2026-08-03T14:16:28Z"
  }
}