CVE-2026-54069 Details.
SiYuan Note <= 3.6.5 - Authentication Bypass
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-54069. What It Means.
SiYuan Note 3.6.5 and prior is vulnerable to authentication bypass. The CheckAuth middleware unconditionally trusted all chrome-extension:// origins, granting RoleAdministrator access without token validation to any request with a spoofed Origin header. Fixed in v3.7.0.
Affected Product. What Is Hit.
- Vendor
- siyuan-note
- Product
- SiYuan Note SiYuan
References. Where To Read More.
More CVEs In SiYuan Note SiYuan.
- CVE-2026-33476HighInformation onlySiYuan <= v3.6.1 - Path TraversalSiYuan NoteCVSS7.5
- CVE-2026-54066HighSiYuan <= 3.6.5 - Unauthenticated Path TraversalSiYuan NoteCVSS7.5
- CVE-2026-34453HighInformation onlySiYuan <= v3.6.1 - Bookmark Data DisclosureSiYuan NoteCVSS7.5
- CVE-2026-29183MediumInformation onlySiYuan Note - Cross-Site ScriptingSiYuan NoteCVSS6.1
- CVE-2026-34605MediumInformation onlySiYuan Note - Cross-Site ScriptingSiYuan NoteCVSS6.1
- CVE-2026-31809MediumInformation onlySiYuan <= v3.5.9 - Cross Site ScriptingSiYuan NoteCVSS6.1
FAQ
Common Questions.
SiYuan Note <= 3.6.5 - Authentication Bypass. SiYuan Note 3.6.5 and prior is vulnerable to authentication bypass. The CheckAuth middleware unconditionally trusted all chrome-extension:// origins, granting RoleAdministrator access without token validation to any request with a spoofed Origin header. Fixed in v3.7.0.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-54069 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-54069 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update SiYuan Note SiYuan to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-54069. Atlas does not run a check for it, so nothing here says whether a particular site is affected.