CVE-2026-93923

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.

Affected Platforms

Weakness Type

CWE-79

References

• https://github.com/siyuan-note/siyuan
• https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/Tree.ts#L133
• https://github.com/siyuan-note/siyuan/blob/v3.8.4/app/src/util/Tree.ts#L194
• https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/render.go#L71-L76
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-928g-4hfq-qwvx
• https://www.vulncheck.com/advisories/siyuan-through-3.8.4-stored-xss-via-heading…