SiYuan: Tag labels from password-protected documents are returned to readers who have not entered the password

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-2026-72792: 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.

CVE: This vulnerability corresponds to CVE-2026-72792. Summary /api/tag/getTag filters its results for reader roles through FilterTagsByPublishIgnore, which checks only the visible publish tier. Documents that are published but password-protected pass that check, so a reader who has never entered a document's publish password receives every tag label used inside it, together with occurrence counts. The project has already treated this exact tier mismatch as a vulnerability on a sibling path: commit 82e9ded42 ("Enforce publish access for graph nodes") moved the graph endpoint off the visible-only filter and onto a password-aware one. FilterTagsByPublishIgnore was not upgraded alongside it. Details | Item | Detail | |---|---| | Route | kernel/api/router.go:194 POST /api/tag/getTag → model.CheckAuth → getTag | | Middleware | CheckAuth only: no CheckReadonly, no CheckAdminRole | | Guard | Present but at the wrong tier: visible-only, no password check | | Exposed | Every tag label…

Published by the source

4 Sep 2026, 21:24 UTC

Last modified by the source

10 Sep 2026, 15:15 UTC

Source last checked

26 Oct 2026, 15:29 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-mp7r-57w4-5qm3

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6427

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-mp7r-57w4-5qm3

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# Patch Next advisory brief: CVE-2026-72792

Advisory: SiYuan: Tag labels from password-protected documents are returned to readers who have not entered the password
IDs: CVE-2026-72792, GHSA-mp7r-57w4-5qm3
Record: https://patchnext.com/advisories/cve-2026-72792 (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 0.0.0-20260726002639-4515fa257cfa. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siyuan-note/siyuan/kernel: affected < 0.0.0-20260726002639-4515fa257cfa; fixed in 0.0.0-20260726002639-4515fa257cfa

## 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/GHSA-mp7r-57w4-5qm3 (OSV record GHSA-mp7r-57w4-5qm3 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260726002639-4515fa257cfa (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6427 (OSV record GO-2026-6427 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260726002639-4515fa257cfa (fixed))
- Verified: https://github.com/advisories/GHSA-mp7r-57w4-5qm3 (GitHub-reviewed advisory GHSA-mp7r-57w4-5qm3 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260726002639-4515fa257cfa)

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