CRITICAL 9.4 NVD
CVE-2026-74800
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 scriptin
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.
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mjf3-jwmf-r6wf
- https://www.vulncheck.com/advisories/siyuan-before-stored-xss-via-assets-endpoint
This critical severity vulnerability with a CVSS score of 9.4 was published on 2026-08-17 via NVD.
Risk Timeline
CVE Disclosed2026-08-17 · -1 days ago
Remediation Resources
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