CVEvulnerability
CVE-2026-93923
8.6 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-09-19
- Last modified
- 2026-09-21
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.6 HIGH — 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:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-79
Description
SiYuan through 3.8.4 fails to escape heading style attributes when rendering outline and bookmark dock HTML, allowing stored cross-site scripting. Attackers can supply crafted notebooks or call administrative endpoints to inject malicious style values that execute in the Electron renderer with full system access.
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/siyuan-note/siyuan github.com
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/Tree.ts#L133 github.com
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/Tree.ts#L194 github.com
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/render.go#L71-L76 github.com
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-928g-4hfq-qwvx github.com
- https://www.vulncheck.com/advisories/siyuan-through-3.8.4-stored-xss-via-heading-style-attribute www.vulncheck.com
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-928g-4hfq-qwvx github.com