# CVE-2026-72804: SiYuan graph endpoints bypass publish password protection

Source: https://junglewise.ai/threats/cve-2026-72804-siyuan-graph-endpoints-bypass-publish-password-protection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-12. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-72804 · Severity: high · CVSS 8.6 · Published 2026-08-12

SiYuan is a popular note-taking and knowledge management application that allows users to publish documents with optional password protection. An attacker can bypass these password protections by calling the graph API endpoints (`getGraph` and `getLocalGraph`) without providing a password, gaining access to the full text content and internal linking structure of all password-protected documents in the workspace. This is a serious confidentiality breach that affects anyone using SiYuan's publish feature with authentication disabled or as a reader.

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

## Quick answers

**Is CVE-2026-72804 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-72804 being exploited in the wild.

**How severe is CVE-2026-72804?** High severity, with a CVSS score of 8.6, published 12 August 2026.

**Which products and versions are affected?** github.com/siyuan-note/siyuan/kernel (Go) < 0.0.0-20260724091654-82e9ded423e4, SEMVER:introduced=0,fixed=0.0.0-20260724091654-82e9ded423e4.

**Is there a fix for CVE-2026-72804?** Yes. github.com/siyuan-note/siyuan/kernel (Go): upgrade to 0.0.0-20260724091654-82e9ded423e4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-72804 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-72804?** Check whether you run github.com/siyuan-note/siyuan/kernel (Go) 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 0.0.0-20260724091654-82e9ded423e4 or later

  ```sh
  go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260724091654-82e9ded423e4
  ```


## Technical details

The vulnerability stems from missing authorization checks in the graph endpoint handlers. Both `getGraph` and `getLocalGraph` filter graph nodes using `FilterGraphByPublishIgnore()`, which only evaluates the visibility tier (checks the invisible-tier set) but contains no password evaluation logic. Password-protected documents are marked `Visible = true` and therefore pass the filter unchanged. Furthermore, graph nodes carry block-level content (not just titles), as `genTreeNodes()` sets `node.Title = node.Label = block.Content`. The endpoints are registered with `CheckAuth` only, making them reachable by any publish reader token or anonymous users when `Publish.Auth.Enable` is disabled. The attack requires no user interaction and no authentication beyond what is already granted to readers.

## Affected products

- siyuan-note siyuan before 0.0.0-20260724091654-82e9ded423e4

## Identifiers

- CVE-2026-72804
- GHSA-vpjw-wf5h-cgpq
- GO-2026-6407

## Timeline

- 2026-07-24: disclosed: Published to GitHub Advisory Database
- 2026-09-03: advisory: GHSA-vpjw-wf5h-cgpq published

## References

- [https://api.github.com/users/Shirshakhtml](https://api.github.com/users/Shirshakhtml)
- [https://github.com/Shirshakhtml](https://github.com/Shirshakhtml)
- [https://api.github.com/users/Shirshakhtml/gists%7B/gist_id%7D](https://api.github.com/users/Shirshakhtml/gists%7B/gist_id%7D)
- [https://api.github.com/users/Shirshakhtml/repos](https://api.github.com/users/Shirshakhtml/repos)
- [https://avatars.githubusercontent.com/u/75179984?v=4](https://avatars.githubusercontent.com/u/75179984?v=4)
- [https://api.github.com/users/Shirshakhtml/events%7B/privacy%7D](https://api.github.com/users/Shirshakhtml/events%7B/privacy%7D)

## Related threats

- [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 WebSocket parser differential allows unauthenticated event stream access](https://junglewise.ai/threats/cve-2026-73054-siyuan-a-parser-differential-between-the-websocket-keepalive)
- [SiYuan authFilePublishAccess information disclosure](https://junglewise.ai/threats/cve-2026-73630-siyuan-authfilepublishaccess-distinguishes-hidden-and-forbidden)
- [SiYuan database backlink information disclosure via publish filter](https://junglewise.ai/threats/cve-2026-73049-siyuan-the-publish-filter-for-database-backlinks-consults-the)
- [SiYuan local storage endpoint discloses administrator activity](https://junglewise.ai/threats/siyuan-the-publish-filter-for-local-storage-returns-the-administrator-s-fab71d28)