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CVE-2026-33203 PUBLISHED CVSS 7.5 HIGH

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.

EPSS 0.11% · 29.2th percentile

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.11%
29.2th percentile

Affected Products

VendorProductVersions
b3logsiyuan0, 0
siyuan-notesiyuan< 3.6.2, < 3.6.2
github.comsiyuan-note/siyuan/kernel0, 0

Timeline

References

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