SiYuan: Graph endpoints omit the publish-password tier: anonymous readers receive block-level content of password-protected documents

Exploitation

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

CVSS

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

EPSS

• CVE-2026-72804: 0.43% estimated exploitation activity in the next 30 days; percentile 37.54 (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-2026-72804. Summary getGraph and getLocalGraph filter reader sessions against the visibility tier only and never check the publish password. Password-protected documents are Visible = true, so their graph nodes survive the filter and graph nodes are block-level and carry the block's actual content. An anonymous reader who has never supplied a document's password can therefore retrieve that document's per-block content and its reference/backlink topology. Both endpoints are CheckAuth-only, so they are reachable by the publish RoleReader token and by the anonymous account when Publish.Auth.Enable is false. Details Both handlers filter with the invisible-tier set only: FilterGraphByPublishIgnore (kernel/model/publishaccess.go:849) drops a node only when !CheckPathAccessableByPublishIgnore(node.Box, node.Path, publishIgnore). There is no password evaluation anywhere in the graph code grepping graph.go for CheckPublishAuthCookie or password…

Published by the source

3 Sep 2026, 22:52 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-vpjw-wf5h-cgpq

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6407

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vpjw-wf5h-cgpq

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-72804

Advisory: SiYuan: Graph endpoints omit the publish-password tier: anonymous readers receive block-level content of password-protected documents
IDs: CVE-2026-72804, GHSA-vpjw-wf5h-cgpq
Record: https://patchnext.com/advisories/cve-2026-72804 (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: High (CVSS 8.6)
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 0.0.0-20260724091654-82e9ded423e4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siyuan-note/siyuan/kernel: affected < 0.0.0-20260724091654-82e9ded423e4; fixed in 0.0.0-20260724091654-82e9ded423e4

## 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-vpjw-wf5h-cgpq (OSV record GHSA-vpjw-wf5h-cgpq lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260724091654-82e9ded423e4 (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6407 (OSV record GO-2026-6407 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260724091654-82e9ded423e4 (fixed))
- Verified: https://github.com/advisories/GHSA-vpjw-wf5h-cgpq (GitHub-reviewed advisory GHSA-vpjw-wf5h-cgpq lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260724091654-82e9ded423e4)

Commands are suggestions: review each one before running it.