# CVE-2026-68587: SiYuan getHeading*Transaction authorization bypass in publish mode

Source: https://junglewise.ai/threats/cve-2026-68587-siyuan-getheading-transaction-authorization-bypass-in-publish  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-03. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-68587 · Severity: high · CVSS 8.6 · Published 2026-09-03

SiYuan is a note-taking and knowledge management application that supports publishing documents with granular access controls. Three API endpoints (`getHeadingDeleteTransaction`, `getHeadingLevelTransaction`, `getHeadingInsertTransaction`) return rendered document content without checking whether the document is marked publish-disabled by an administrator, allowing anonymous readers or low-privileged accounts to view sensitive content that should be hidden. An attacker who knows a heading's block ID can bypass content restrictions and read full document text from documents explicitly marked as not publishable.

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-2026-68587 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-68587 being exploited in the wild.

**How severe is CVE-2026-68587?** High severity, with a CVSS score of 8.6, published 3 September 2026.

**Which products and versions are affected?** github.com/siyuan-note/siyuan/kernel (Go) < 0.0.0-20260721013353-69db783b782a, SEMVER:introduced=0,fixed=0.0.0-20260721013353-69db783b782a; SiYuan before 0.0.0-20260721013353-69db783b782a.

**Is there a fix for CVE-2026-68587?** Yes. github.com/siyuan-note/siyuan/kernel (Go): upgrade to 0.0.0-20260721013353-69db783b782a or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-68587 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-68587?** 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 0.0.0-20260721013353-69db783b782a or later

  ```sh
  go get github.com/siyuan-note/siyuan/kernel@v0.0.0-20260721013353-69db783b782a
  ```


## Technical details

The vulnerability is a missing authorization check (CWE-862) in three heading transaction endpoints. These endpoints (`/api/block/getHeadingDeleteTransaction`, `/api/block/getHeadingLevelTransaction`, `/api/block/getHeadingInsertTransaction`) are gated only by `CheckAuth`, which permits both anonymous readers and RoleReader tokens in publish mode. Despite their mutation-implying names, these endpoints compute but do not execute transactions; they return rendered DOM of the heading subtree in the transaction payload without invoking the publish-access filter (`IsReadOnlyRoleContext`) that the reader-safe content path (`getDoc`) applies. An attacker with a heading block ID can extract full rendered HTML content from documents marked publish-disabled, defeating administrator-configured access boundaries. The precondition is knowledge of the target heading's block ID; when chained with other CheckAuth-only endpoints lacking publish-access filters, this enables end-to-end disclosure of publish-disabled documents. No write privilege, admin role, or CSRF token is required. Patched in version 0.0.0-20260721013353-69db783b782a.

## Affected products

- SiYuan SiYuan before 0.0.0-20260721013353-69db783b782a

## Identifiers

- CVE-2026-68587
- GHSA-69mh-gvh4-8gp7
- GO-2026-6381

## Timeline

- 2026-09-03: disclosed: GitHub Advisory GHSA-69mh-gvh4-8gp7 published
- 2026-07-21: patched: Fix released in version 0.0.0-20260721013353-69db783b782a (commit 69db783)

## 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 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)