Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
SiYuan kernel (Go package github.com/siyuan-note/siyuan/kernel) before 3.6.2 accepts unauthenticated WebSocket connections when a specific keepalive query parameter is present. A remote attacker with network access can send malformed messages that trigger a runtime panic, repeatedly crashing the kernel and causing denial of service. Upgrade to version 3.6.2 or later. The source gives few details on workarounds.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0053, the 44th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:08 UTC First seen by agentprime
- 31 Oct 2026, 15:08 UTC Confirmed by OSV