CVE-2026-72794 siyuan before v3.7.4 Session Cookie Key Disclosure via getConf
Unauthenticated attackers can retrieve the session cookie signing key in publish mode to forge cookies and impersonate users or gain admin access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72794?
CVE-2026-72794 is a critical vulnerability in siyuan-note siyuan, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
siyuan versions before v3.7.4 expose the session cookie signing key through the /api/system/getConf endpoint to unauthenticated users in publish mode. Attackers can retrieve the CookieKey value and forge valid session cookies to impersonate users or gain administrative access.
Weakness: CWE-522
Which versions are affected by CVE-2026-72794?
3 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 | 0.0.0-20260725123945-77421530be4a |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260725123945-77421530be4a |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260725123945-77421530be4a |
How do I fix CVE-2026-72794?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260725123945-77421530be4a or later.
Is CVE-2026-72794 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72794 exists.
Sources
Also known as GHSA-34fj-mwm6-fjfg, GO-2026-6420.