CVE-2026-93922CWE-79cross-site-scripting

CVE-2026-93922

High · published September 19, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
56.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
8.6 · 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
EPSS
0.00816 · 56.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-19T04:16Z
References (6)
https://github.com/siyuan-note/siyuan · [email protected]https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/mount.ts#L72 · [email protected]https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/file.go#L2446-L2454 · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8c2m-33v9-vvqm · [email protected]https://www.vulncheck.com/advisories/siyuan-through-3.8.4-stored-xss-via-notebook-names · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8c2m-33v9-vvqm · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 23 SEP 03:49Z
    EPSS moved — → 1%
    epss
  • 18 SEP 23:12Z
    SiYuan through 3.8.4 Stored XSS via notebook names
    cvelistv5