What is GHSA-v4hj-628x-hq5x?

GHSA-v4hj-628x-hq5x is a security advisory published by GitHub Security Advisories with Critical severity. SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when...

Which CVE IDs does GHSA-v4hj-628x-hq5x cover?

GHSA-v4hj-628x-hq5x covers the following CVE IDs: CVE-2026-74800. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-v4hj-628x-hq5x?

GHSA-v4hj-628x-hq5x has a CVSS v3 base score of 9.0, published by GitHub Security Advisories.

GHSA-v4hj-628x-hq5xCriticalCVSS 9.0

SiYuan before v3.7.4 fails to set Content-Disposition and X-Content-Type-Options headers when...

Vendor

GitHub Security Advisories

Published

August 17, 2026

Last Modified

August 17, 2026

🔗 CVE IDs covered (1)

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.

🔗 References (4)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mjf3-jwmf-r6wf
https://nvd.nist.gov/vuln/detail/CVE-2026-74800
https://www.vulncheck.com/advisories/siyuan-before-stored-xss-via-assets-endpoint
https://github.com/advisories/GHSA-v4hj-628x-hq5x