Missing Authentication for Critical Function Affecting github.com/siyuan-note/siyuan/kernel/server package, versions <3.6.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMSIYUANNOTESIYUANKERNELSERVER-15762709
- published24 Mar 2026
- disclosed18 Mar 2026
- creditmith36
Introduced: 18 Mar 2026
CVE-2026-33203 Â (opens in a new tab)How to fix?
Upgrade github.com/siyuan-note/siyuan/kernel/server to version 3.6.2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authentication for Critical Function through the WebSocket message handler in kernel/server/serve.go. An attacker can crash the kernel process and disrupt service availability by sending malformed JSON over an unauthenticated WebSocket connection.