CVE-2026-72793 SiYuan before v3.7.4 Information Disclosure via /api/system/getConf
Attackers can retrieve sensitive keys from the API to forge sessions and escalate privileges to administrator on SiYuan instances.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72793?
CVE-2026-72793 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 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.
Weakness: CWE-522
Which versions are affected by CVE-2026-72793?
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 | 0.0.0-20260725132049-2d8b98395a91 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260725132049-2d8b98395a91 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260725132049-2d8b98395a91 |
How do I fix CVE-2026-72793?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260725132049-2d8b98395a91 or later.
Is CVE-2026-72793 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-72793 exists.
Sources
Also known as GHSA-h4v5-crx2-3cv4, GO-2026-6424.