GHSA-8wx9-j7j5-h9vp: Duplicate Advisory Localhost-trust Admin Bypass On Auth-code-gated Vulnerability

HIGH
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CVSS 8.0
CWE-290
Published
Advisory Summary

GHSA-8wx9-j7j5-h9vp is a HIGH (CVSS 8.0) localhost-trust admin bypass on auth-code-gated vulnerability (CWE-290: Authentication Bypass by Spoofing) affecting Duplicate Advisory libraries in the Go ecosystem. The issue involves localhost-trust admin bypass on auth-code-gated endpoints, with potential remote reachability via the fixed-port prox. Remediation is available in the latest vendor maintenance releases.

GHSA-8wx9-j7j5-h9vp at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-8wx9-j7j5-h9vp
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-290: Authentication Bypass by Spoofing
Affected Product Duplicate Advisory
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.0

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

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

How to Fix GHSA-8wx9-j7j5-h9vp

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.

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-8wx9-j7j5-h9vp, inspect your project dependencies for Duplicate Advisory:

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

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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-290: Authentication Bypass by Spoofing, where this attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. 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-3mp7-4rh5-jrv9. This link is maintained to preserve external references. ## Original Description SiYuan versions <= v3.7.2 (patched in v3.7.4) contain an authentication bypass vulnerability in the kernel's CheckAuth function, which grants the administrator role (RoleAdministrator) to any request whose RemoteAddr is loopback (127.0.0.1) for a specific set of endpoints (including /api/system/exit, getNetwork, getWorkspaceInfo, /assets/*, and /export/*). These localhost bypasses sit outside the access auth code gate, so they apply even when an access auth code is configured. Because the fixed-port reverse proxy forwards requests to the kernel over loopback without injecting an authentication token and does not configure trusted proxies, a request forwarded through this proxy reaches the kernel with RemoteAddr = 127.0.0.1. If the fixed-port proxy is bound to a network interface, this could allow a remote unauthenticated attacker to obtain admin access on the affected endpoints; however, per the advisory this remote forwarding behavior was established only by code inspection and was not reproduced end-to-end.

GHSA-8wx9-j7j5-h9vp Affected Duplicate Advisory 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

References

GitHub Advisory / Wiki ADVISORY
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3mp7-4rh5-jrv9
NVD — GHSA-8wx9-j7j5-h9vp NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72809
www.vulncheck.com/advisories/siyuan-b... WEB
https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-localhost-trust

Frequently Asked Questions

What is GHSA-8wx9-j7j5-h9vp?
GHSA-8wx9-j7j5-h9vp is a security vulnerability in Duplicate Advisory involving Localhost-trust admin bypass on auth-code-gated endpoints, with potential remote reachability via the fixed-port prox under CWE-290: Authentication Bypass by Spoofing.
Which Duplicate Advisory 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-8wx9-j7j5-h9vp?
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 is the CVSS score of GHSA-8wx9-j7j5-h9vp?
GHSA-8wx9-j7j5-h9vp has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.
What CWE is associated with GHSA-8wx9-j7j5-h9vp?
GHSA-8wx9-j7j5-h9vp is classified under CWE-290: Authentication Bypass by Spoofing (This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.).
How can I check Go dependencies for GHSA-8wx9-j7j5-h9vp?
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-8wx9-j7j5-h9vp",
  "modified" : "2026-09-03T22:32:26Z",
  "published" : "2026-08-12T21:31:42Z",
  "withdrawn" : "2026-09-03T22:32:26Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Localhost-trust admin bypass on auth-code-gated endpoints, with potential remote reachability via the fixed-port prox",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-3mp7-4rh5-jrv9. This link is maintained to preserve external references.\n\n## Original Description\nSiYuan versions <= v3.7.2 (patched in v3.7.4) contain an authentication bypass vulnerability in the kernel's CheckAuth function, which grants the administrator role (RoleAdministrator) to any request whose RemoteAddr is loopback (127.0.0.1) for a specific set of endpoints (including /api/system/exit, getNetwork, getWorkspaceInfo, /assets/*, and /export/*). These localhost bypasses sit outside the access auth code gate, so they apply even when an access auth code is configured. Because the fixed-port reverse proxy forwards requests to the kernel over loopback without injecting an authentication token and does not configure trusted proxies, a request forwarded through this proxy reaches the kernel with RemoteAddr = 127.0.0.1. If the fixed-port proxy is bound to a network interface, this could allow a remote unauthenticated attacker to obtain admin access on the affected endpoints; however, per the advisory this remote forwarding behavior was established only by code inspection and was not reproduced end-to-end.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/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" : "Go",
      "name" : "github.com/siyuan-note/siyuan/kernel"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 3.7.4"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3mp7-4rh5-jrv9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-72809"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-localhost-trust"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-290" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-03T22:32:26Z",
    "nvd_published_at" : "2026-08-12T20:17:53Z"
  }
}