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Advisory record · GHSA-36v8-mpjm-8j5r

SiYuan: Cross-boundary content disclosure via getBacklinkDoc/getBackmentionDoc (publish mode): reader-reachable rendered DOM of publish-forbidden docs; sibling list endpoints are filtered

CVSS 9.2 CriticalCriticalEPSS 0.0041 · 35th percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 3 Sept 2026, 21:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/siyuan-note/siyuan/kernelGo<0.0.0-20260721014413-f45749a7ef6e0.0.0-20260721014413-f45749a7ef6e
Identifiers
GHSA-36v8-mpjm-8j5r · CVE-2026-68586 · GO-2026-6379
Weakness (CWE)
CWE-862
Tags
Published
3 Sept 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Two endpoints in SiYuan (Go package github.com/siyuan-note/siyuan/kernel, versions up to and including 0.0.0-20260721014413-f45749a7ef6e) return the rendered content of blocks from documents that publish mode should hide. An anonymous reader can call getBacklinkDoc or getBackmentionDoc to read that content, and can also tell whether a hidden document references a given block. The fix is listed as 0.0.0-20260721014413-f45749a7ef6e, so upgrade to that version.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0041, the 35th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:13 UTC First seen by agentprime
  2. 31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.