CVE-2026-93591 SiYuan before 3.8.3 SQL Injection via unescaped tag in graph.go
Attackers can inject SQL via graph endpoints to exfiltrate private data from SiYuan notebooks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93591?
CVE-2026-93591 is a high-severity SQL injection vulnerability in siyuan-note siyuan, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SiYuan versions before 3.8.3 contain an SQL injection vulnerability in the graph.go query2Stmt function where tag values are concatenated raw into SQL string literals without escaping single quotes. A publish-mode reader or anonymous visitor can inject SQL via inline HTML span tags in the getGraph endpoint to execute arbitrary queries on the read-write database and exfiltrate private data across notebooks.
Weakness: CWE-89
Which versions are affected by CVE-2026-93591?
How do I fix CVE-2026-93591?
No fix has been published for CVE-2026-93591 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-93591 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93591 exists.
Sources
Also known as GHSA-4m3r-2vx9-4x56, GHSA-5rwv-4j4c-f954.