CVE-2026-74800 — SiYuan before v3.7.4 Stored XSS via assets endpoint
SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authen…
Published: 2026-08-17 · CVSS: 9.4 · CVSS 4.0
SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when serving arbitrary file assets, allowing stored cross-site scripting attacks. Authenticated attackers can upload HTML files as assets and execute scripts with full kernel API access when the workspace owner opens the asset link.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7