CVE-2026-93922

HIGH 8.8

SiYuan through 3.8.4 Stored XSS via notebook names

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan through 3.8.4 renders notebook names as raw HTML in the Daily Note picker dialog without escaping, allowing stored cross-site scripting in the Electron renderer. Attackers can create notebooks with HTML payloads in names that execute JavaScript with Node.js access when the picker opens, enabling operating system command execution.

CWE	CWE-79
Vendor	siyuan-note
Product	siyuan
Published	Sep 18, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

siyuan-note / siyuan

0 ≤ 3.8.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8c2m-33v9-vvqm github.com: https://github.com/siyuan-note/siyuan github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/mount.ts#L72 github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/file.go#L2446-L2454 vulncheck.com: https://www.vulncheck.com/advisories/siyuan-through-3.8.4-stored-xss-via-notebook-names

Credits

EVIL0RD