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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 17 Aug 2026 11:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | SiYuan before v3.7.4 Stored XSS via assets endpoint | |
| First Time appeared |
B3log
B3log siyuan |
|
| Weaknesses | CWE-79 | |
| CPEs | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* | |
| Vendors & Products |
B3log
B3log siyuan |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-17T16:04:24.746Z
Reserved: 2026-08-16T12:59:42.223Z
Link: CVE-2026-74800
No data.
Status : Received
Published: 2026-08-17T11:16:40.187
Modified: 2026-08-17T16:17:49.060
Link: CVE-2026-74800
No data.
OpenCVE Enrichment
Updated: 2026-08-17T13:15:04Z
Weaknesses