CVE-2026-54066 Scanner.
SiYuan <= 3.6.5 - Unauthenticated Path Traversal
Free and read-only. Scan only sites you own or are allowed to test.
What This Check Does.
Read-only
It only asks your site for public pages, the way a browser would. Nothing is changed, uploaded or stored.
Up to 1 request
A small, fixed number of requests, so the check is quick and will not load your site.
Looks for CVE-2026-54066
It looks for the specific sign of this one vulnerability and ends with a clear answer: vulnerable, not vulnerable, or could not be determined.
About CVE-2026-54066. What It Means.
SiYuan <= 3.6.5 contains a path traversal via double URL-encoding in the /assets/ route (publish mode port 6808), allowing unauthenticated attackers to read arbitrary files inside WorkspaceDir including conf/conf.json which exposes the API token and access auth code.
More CVEs In SiYuan Note SiYuan.
- CVE-2026-54069HighInformation onlySiYuan Note <= 3.6.5 - Authentication BypassSiYuan NoteCVSS9.1
- CVE-2026-33476HighInformation onlySiYuan <= v3.6.1 - 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 <= 3.6.5 - Unauthenticated Path Traversal. SiYuan <= 3.6.5 contains a path traversal via double URL-encoding in the /assets/ route (publish mode port 6808), allowing unauthenticated attackers to read arbitrary files inside WorkspaceDir including conf/conf.json which exposes the API token and access auth code.
Atlas sends up to 1 read-only request to your site and looks for the specific sign of CVE-2026-54066 in SiYuan Note SiYuan. Nothing is changed, uploaded or stored on your site.
CVE-2026-54066 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing. Its CVSS score is 7.5.
Yes. The check only reads public pages, the same way a browser or a search engine would. Scan only sites you own or are allowed to test.
It means no sign of CVE-2026-54066 was found by this read-only check. It does not prove the site is free of other weaknesses.
Update SiYuan Note SiYuan to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. The vendor links and details are in the CVE-2026-54066 briefing linked on this page.
Scan only sites you own or have written permission to test. A result of Not Vulnerable means this read-only check found no sign of CVE-2026-54066; it is not a guarantee that the site is secure.