Vulnerability · Published Aug 14, 2026 · Assigned by VulnCheck
CVE-2026-73630SiYuan before v3.7.4 Information Disclosure via authFilePublishAccess
Medium 5.8
In plain English
A medium-severity security flaw in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/filetree/authFilePublishAccess endpoint, which is registered with CheckAuth only and is reachable anonymously. The endpoint never sets a failure code, so its outcome is signalled entirely by the response message and by the presence of a Set-Cookie header, and these signals differ across access tiers. By submitting requests with an empty password for a candidate document identifier, an anonymous attacker can distinguish whether a document is public/nonexistent, password-protected, or exists at the hidden or forbidden tier, thereby confirming the existence of documents they are not permitted to access. Because hidden and forbidden entries store an empty password, such requests also cause the server to issue a publish-auth cookie for forbidden documents.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260731093152-c7522b8db586 | GHSA-4pjg-x8qj-33j5 |
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260731093152-c7522b8db586 | GO-2026-6828 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | 0 – before 3.7.4 |
Weakness: CWE-203 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-4pjg-x8qj-33j5) vendor-advisory
- VulnCheck Advisory: SiYuan before v3.7.4 Information Disclosure via authFilePublishAccess third-party-advisory