CVE-2026-74800

CVE-2026-74800CVE-2026-74800

Description

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.

Scoring

CVSS 9.0 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Last modified2026-08-17
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.