CVE-2026-93922

high

Description

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.

References

https://www.vulncheck.com/advisories/siyuan-through-3.8.4-stored-xss-via-notebook-names

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8c2m-33v9-vvqm

https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/file.go#L2446-L2454

https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/mount.ts#L72

https://github.com/siyuan-note/siyuan

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83458

Details

Source: Mitre, NVD

Published: 2026-09-19

Updated: 2026-09-22

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 8.8

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

Severity: High

CVSS v4

Base Score: 8.6

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00816