# CVE-2026-54069: SiYuan Note unauthenticated admin API access via browser extensions

Source: https://junglewise.ai/threats/cve-2026-54069-siyuan-note-unauthenticated-admin-api-access-via-browser  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-24. Updated: 2026-07-10  
License: CC BY 4.0 with a link back

CVE-2026-54069 · Severity: critical · CVSS 4 · Published 2026-06-24

SiYuan Note, a personal knowledge management system, contains a security flaw that allows any installed browser extension to access its administrative functions without a password. This could allow a malicious or compromised browser extension to steal a user's private notes, inject malicious scripts, or change application settings. The risk is particularly high for desktop users where this protection is disabled by default.

Technologies: [github.com/siyuan-note/siyuan/kernel (Go)](https://junglewise.ai/threats/technologies/github-com-siyuan-note-siyuan-kernel), [SiYuan](https://junglewise.ai/threats/technologies/siyuan). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [SiYuan](https://junglewise.ai/threats/vendors/siyuan).

## Quick answers

**Is CVE-2026-54069 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54069 being exploited in the wild.

**How severe is CVE-2026-54069?** Critical severity, with a CVSS score of 4, published 24 June 2026.

**Which products and versions are affected?** github.com/siyuan-note/siyuan/kernel (Go) < 0.0.0-20260628153353-2d5d72223df4, SEMVER:introduced=0,fixed=0.0.0-20260628153353-2d5d72223df4; SiYuan < 3.7.0.

**Is there a fix for CVE-2026-54069?** Yes. github.com/siyuan-note/siyuan/kernel (Go): upgrade to 0.0.0-20260628153353-2d5d72223df4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54069 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-54069?** Check whether you run github.com/siyuan-note/siyuan/kernel (Go) or SiYuan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/siyuan-note/siyuan/kernel (Go): upgrade to 0.0.0-20260628153353-2d5d72223df4 or later

  ```sh
  go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260628153353-2d5d72223df4
  ```


## Technical details

An origin validation error (CWE-346) exists in the SiYuan kernel's authentication middleware. Specifically, `kernel/model/session.go` contains a check that exempts any request with a `chrome-extension://` origin prefix from authentication, automatically assigning it `RoleAdministrator`. Because desktop installations often have an empty `AccessAuthCode` by default, any Chrome/Chromium extension can make arbitrary API calls to the local kernel at `127.0.0.1:6806`. Attackers can leverage this to exfiltrate data via SQL queries, inject stored XSS into notes, or modify system configurations. A patch is available in version 0.0.0-20260628153353-2d5d72223df4.

## Affected products

- siyuan-note SiYuan <= v3.6.5

## Identifiers

- CVE-2026-54069
- GHSA-hvr9-72v2-fff3
- GO-2026-5961

## Timeline

- 2026-06-24: advisory: NVD publication date
- 2026-07-10: disclosed: GitHub Advisory published
- 2026-06-28: patched: Fix commit date

## References

- [https://api.github.com/users/oduoke567](https://api.github.com/users/oduoke567)
- [https://github.com/oduoke567](https://github.com/oduoke567)
- [https://api.github.com/users/oduoke567/gists%7B/gist_id%7D](https://api.github.com/users/oduoke567/gists%7B/gist_id%7D)
- [https://api.github.com/users/oduoke567/repos](https://api.github.com/users/oduoke567/repos)
- [https://avatars.githubusercontent.com/u/102439013?v=4](https://avatars.githubusercontent.com/u/102439013?v=4)
- [https://api.github.com/users/oduoke567/events%7B/privacy%7D](https://api.github.com/users/oduoke567/events%7B/privacy%7D)

## Related threats

- [SiYuan path traversal in web fetch](https://junglewise.ai/threats/cve-2026-126776-siyuan-3-7-0-before-3-8-10-on-windows-contains-a-path-traversal)
- [SiYuan publish filter information disclosure in local storage](https://junglewise.ai/threats/go-2026-6836-siyuan-the-publish-filter-for-local-storage-returns-the-7f022e62)
- [SiYuan path traversal via GLOBALROOT alias bypass](https://junglewise.ai/threats/cve-2026-118680-siyuan-3-8-7-through-3-8-8-fails-to-normalize-windows-globalroot)
- [SiYuan SQL injection in history search](https://junglewise.ai/threats/cve-2026-116170-siyuan-before-v3-8-7-contains-an-sql-injection-vulnerability)
- [SiYuan cross-site scripting in /check-auth redirect](https://junglewise.ai/threats/cve-2026-116167-siyuan-from-2-9-0-before-3-8-7-contains-a-cross-site-scripting)