SiYuan: Embedded (transclusion) block content is returned without publish-access filtering, leaking private and password-protected document content to anonymous readers

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-2026-72795: 0.30% estimated exploitation activity in the next 30 days; percentile 23.35 (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-2026-72795. Summary /api/block/getBlockDOMWithEmbed and /api/block/getBlockDOMsWithEmbed gate only the requested block against publish access. The blocks pulled in by that block's embed (transclusion) query are inlined into the returned DOM with no publish-access check at all, so a reader who requests a legitimately-published block containing an embed query receives the content of every block that query matched including blocks in hidden, forbidden and password-protected documents. The dedicated embed endpoint getEmbedBlock filters these same results for reader roles. The DOM-with-embed path does not. Details | Item | Detail | |---|---| | Routes | kernel/api/router.go:226 POST /api/block/getBlockDOMWithEmbed → model.CheckAuth → getBlockDOMWithEmbed; :227 POST /api/block/getBlockDOMsWithEmbed → model.CheckAuth → getBlockDOMsWithEmbed | | Middleware | CheckAuth only — no CheckReadonly, no CheckAdminRole → reachable by the publish RoleReader…

Published by the source

4 Sep 2026, 21:13 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-h6w7-xxcf-w2mq

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6425

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-h6w7-xxcf-w2mq

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# Patch Next advisory brief: CVE-2026-72795

Advisory: SiYuan: Embedded (transclusion) block content is returned without publish-access filtering, leaking private and password-protected document content to anonymous readers
IDs: CVE-2026-72795, GHSA-h6w7-xxcf-w2mq
Record: https://patchnext.com/advisories/cve-2026-72795 (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 0.0.0-20260725125659-1ca1c3c9d94b. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/siyuan-note/siyuan/kernel: affected < 0.0.0-20260725125659-1ca1c3c9d94b; fixed in 0.0.0-20260725125659-1ca1c3c9d94b

## 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-h6w7-xxcf-w2mq (OSV record GHSA-h6w7-xxcf-w2mq lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260725125659-1ca1c3c9d94b (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6425 (OSV record GO-2026-6425 lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260725125659-1ca1c3c9d94b (fixed))
- Verified: https://github.com/advisories/GHSA-h6w7-xxcf-w2mq (GitHub-reviewed advisory GHSA-h6w7-xxcf-w2mq lists affected ranges: Go github.com/siyuan-note/siyuan/kernel >=0 <0.0.0-20260725125659-1ca1c3c9d94b)

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