Vulnerability record · CVE-2026-93922 · published 19 September 2026

CVE-2026-93922: Cross-site scripting vulnerability

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.

8.6 CVSS 4.0 High EPSS 0.82% · top 44.6% CWE-79 · Cross-site scripting Deferred

8.6CVSS 4.0 base score

0.82%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

22 Sep 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/siyuan-note/siyuan
https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/mount.ts#L72
https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/file.go#L2446-L2454
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8c2m-33v9-vvqm
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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-93922), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.