Critical severity9.0NVD Advisory· Published Aug 17, 2026

CVE-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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Siyuan Note/Siyuanllm-fuzzy
Range: <3.7.4

Patches

Vulnerability mechanics

References

github.com/siyuan-note/siyuan/security/advisories/GHSA-mjf3-jwmf-r6wfnvd
www.vulncheck.com/advisories/siyuan-before-stored-xss-via-assets-endpointnvd

News mentions

No linked articles in our index yet.

cvss	0.585
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000