CVE-2026-101091 SiYuan before v3.8.4 SQL Injection via Block Query Embed
Attackers can execute arbitrary SQL commands via malicious documents in SiYuan, potentially leading to code execution or data modification without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-101091?
CVE-2026-101091 is a high-severity SQL injection vulnerability in siyuan-note siyuan, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
SiYuan versions before v3.8.4 fail to properly validate SQL statements in block query embed blocks executed against siyuan.db. Attackers can craft malicious .sy documents with non-read-only SQL statements that execute automatically during background indexing, rendering, or export operations without authentication.
Weakness: CWE-89
Which versions are affected by CVE-2026-101091?
How do I fix CVE-2026-101091?
No fix has been published for CVE-2026-101091 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-2026-101091 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101091 exists.
Sources
Also known as GHSA-67p9-hm94-xwf3, GHSA-7fjj-5cqf-p4pm.