SiYuan is a personal knowledge management system. Prior to version 3.6.2, the SiYuan kernel WebSocket server accepts unauthenticated connections when a specific "auth keepalive" query parameter is present. After connection, incoming messages are parsed using unchecked type assertions on attacker-controlled JSON. A remote attacker can send malformed messages that trigger a runtime panic, potentially crashing the kernel process and causing denial of service. Version 3.6.2 fixes the issue.
Metrics
Affected Vendors & Products
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-3g9h-9hp4-654v | SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass |
Fixes
Solution
No solution given by the vendor.
Workaround
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References
History
Fri, 20 Mar 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | SiYuan is a personal knowledge management system. Prior to version 3.6.2, the SiYuan kernel WebSocket server accepts unauthenticated connections when a specific "auth keepalive" query parameter is present. After connection, incoming messages are parsed using unchecked type assertions on attacker-controlled JSON. A remote attacker can send malformed messages that trigger a runtime panic, potentially crashing the kernel process and causing denial of service. Version 3.6.2 fixes the issue. | |
| Title | SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass | |
| Weaknesses | CWE-248 CWE-306 |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-20T22:32:33.219Z
Reserved: 2026-03-17T23:23:58.312Z
Link: CVE-2026-33203
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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