CVE-2026-73630 SiYuan before v3.7.4 Information Disclosure via authFilePublishAccess
An anonymous attacker can confirm the existence of hidden or forbidden documents and obtain publish-auth cookies for them via the authFilePublishAccess endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73630?
CVE-2026-73630 is a medium-severity vulnerability in siyuan-note siyuan, published on 14 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-203
Which versions are affected by CVE-2026-73630?
2 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel.
| Package | Affected | Fixed in |
|---|---|---|
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260731093152-c7522b8db586 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260731093152-c7522b8db586 |
How do I fix CVE-2026-73630?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260731093152-c7522b8db586 or later.
Is CVE-2026-73630 being exploited?
There is no known exploitation of CVE-2026-73630 in the wild and no public exploit code.
Sources
Also known as GHSA-4pjg-x8qj-33j5.