CVE-2026-73054 SiYuan before v3.7.4 Authentication Bypass via WebSocket
Unauthenticated attackers can bypass WebSocket authentication to access sensitive document metadata and operation logs in SiYuan.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73054?
CVE-2026-73054 is a high-severity authentication bypass vulnerability in siyuan-note siyuan, published on 15 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 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.
Weakness: CWE-287
Which versions are affected by CVE-2026-73054?
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 | 0.0.0-20260731131820-67bc300b6ea6 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260731131820-67bc300b6ea6 |
How do I fix CVE-2026-73054?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260731131820-67bc300b6ea6 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-73054 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73054 exists.
Sources
Also known as GHSA-c8w8-3pqp-wr83.