SiYuan: getBookmarkLabels returns every bookmark label in the workspace to anonymous readers, with no publish-access filtering

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS

• CVE-2026-73609: 0.33% estimated exploitation activity in the next 30 days; percentile 25.60 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary /api/attr/getBookmarkLabels is registered with CheckAuth only and applies no filtering of any kind. It runs a scan of the entire blocks table and returns the distinct set of every bookmark label in the workspace. An anonymous reader in publish mode receives the author's complete bookmark vocabulary, regardless of whether the bookmarked blocks live in published, hidden, password-protected or forbidden documents. The adjacent endpoint that returns bookmarks with their blocks does filter, and does so in a way that makes the intended rule explicit: it drops a label entirely when no accessible block carries it. Details Route. kernel/api/router.go:297 on master, :300 on the development branch: No CheckAdminRole, no CheckReadonly. Reachable by the publish RoleReader token and anonymously when Publish.Auth.Enable is false. The handler (kernel/api/attr.go) is a single line: which reaches kernel/model/bookmark.go:184 and then sql.QueryBookmarkLabels() at kernel/sql/blockquery.go:315:…

Published by the source

1 Oct 2026, 16:23 UTC

Last modified by the source

7 Oct 2026, 17:45 UTC

Source last checked

26 Oct 2026, 15:29 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-j4ph-9xwf-wcj4

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6634

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-j4ph-9xwf-wcj4

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# Patch Next advisory brief: CVE-2026-73609

Advisory: SiYuan: getBookmarkLabels returns every bookmark label in the workspace to anonymous readers, with no publish-access filtering
IDs: CVE-2026-73609, GHSA-j4ph-9xwf-wcj4
Record: https://patchnext.com/advisories/cve-2026-73609 (revision 3, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/siyuan-note/siyuan/kernel 0.0.0-20260812083335-251596fc0de2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siyuan-note/siyuan/kernel: affected < 0.0.0-20260812083335-251596fc0de2; fixed in 0.0.0-20260812083335-251596fc0de2

## Suggested inspection (read-only)
- Go github.com/siyuan-note/siyuan/kernel: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/siyuan-note/siyuan/kernel.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6634 (OSV record GO-2026-6634 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260812083335-251596fc0de2 (fixed))
- Verified: https://osv.dev/vulnerability/GHSA-j4ph-9xwf-wcj4 (OSV record GHSA-j4ph-9xwf-wcj4 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260812083335-251596fc0de2 (fixed))
- Verified: https://github.com/advisories/GHSA-j4ph-9xwf-wcj4 (GitHub-reviewed advisory GHSA-j4ph-9xwf-wcj4 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260812083335-251596fc0de2)

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