SiYuan before v3.7.4 Information Disclosure via Block Endpoints (CVE-2026-72805) | HOL Guard CVE

Medium · CVSS 5.8CVE-2026-72805GHSA-67X2-MQ63-V9VM

SiYuan before v3.7.4 Information Disclosure via Block Endpoints

Answer in brief

CVE-2026-72805 records a Medium severity (CVSS 5.8) vulnerability in SiYuan before v3.7.4 Information Disclosure via Block Endpoints. The current sources do not mark it as known exploited. The current feed maps siyuan-note/siyuan (generic), github.com/siyuan-note/siyuan/kernel (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 12, 2026Updated Sep 3, 2026Source checked Sep 29, 2026First seen by HOL Aug 12, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps siyuan-note/siyuan (generic), github.com/siyuan-note/siyuan/kernel (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
siyuan-note/siyuangeneric	>=0 <3.7.4	3.7.4
github.com/siyuan-note/siyuan/kernelgo	<0.0.0-20260723163028-931ba693375e	0.0.0-20260723163028-931ba693375e

Recommended response

Check inventory. Check lockfiles and deployed manifests for siyuan-note/siyuan, github.com/siyuan-note/siyuan/kernel.
Review the reported fix. Update siyuan-note/siyuan to 3.7.4; github.com/siyuan-note/siyuan/kernel to 0.0.0-20260723163028-931ba693375e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 12, 2026

Sources and claim methodology

Upstream source description

SiYuan versions before v3.7.4 fail to enforce publish-access checks on getBlockBreadcrumb, getRefText, and getBlockTreeInfos endpoints, allowing disclosure of protected document content and metadata. Anonymous readers or publish RoleReader accounts can retrieve document titles, ancestor block content snippets, reference text, and path metadata for publish-forbidden or password-protected documents by supplying block IDs.

Quoted source text, attributed separately from HOL analysis.