MEDIUM 6.9 NVD
CVE-2026-123492
SiYuan before 3.8.9 contains a nil pointer dereference vulnerability in privateCacheMiddleware that allows authenticated attackers to crash the kernel by readin
SiYuan before 3.8.9 contains a nil pointer dereference vulnerability in privateCacheMiddleware that allows authenticated attackers to crash the kernel by reading nonexistent MCP resources. Attackers with a valid API token can send a resources/read request in an initialized MCP session, causing a panic that terminates the kernel process and interrupts service.
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-2x3p-x74g-442x
- https://www.vulncheck.com/advisories/siyuan-before-3.8.9-nil-pointer-dereference-dos-via-m
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-11-06 via NVD.
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