SiYuan before v3.7.4 SQL Injection via backlink search (CVE-2026-72811) | HOL Guard CVE

Critical · CVSS 10.0CVE-2026-72811GHSA-Q2VG-7QGX-X5FC

SiYuan before v3.7.4 SQL Injection via backlink search

Answer in brief

CVE-2026-72811 records a Critical severity (CVSS 10.0) vulnerability in SiYuan before v3.7.4 SQL Injection via backlink search. 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 14, 2026Updated Sep 3, 2026Source checked Sep 29, 2026First seen by HOL Aug 14, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 10.0
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 10.0. 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	<0.0.0-20260723004839-1a5b3431d5ab	0.0.0-20260723004839-1a5b3431d5ab

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 0.0.0-20260723004839-1a5b3431d5ab if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 14, 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 14, 2026

Sources and claim methodology

Upstream source description

SiYuan versions <= v3.7.2 contain a SQL injection vulnerability in the backlink/mention search query (kernel/model/backlink.go), which concatenates stored block metadata (title, name, alias, anchor text) and the client-supplied keyword into a SQL MATCH/search statement while escaping only the double-quote character and not the single quote. A single quote in the client keyword (first-order, reachable by an anonymous or RoleReader user on the publish surface) or in stored document metadata (second-order) breaks out of the string literal. Because the query runs on the main read-write siyuan.db handle via a statement-stacking-capable driver, an attacker can execute arbitrary SQL, enabling cross-notebook read and write. Fixed in v3.7.4.

Quoted source text, attributed separately from HOL analysis.