CVE-2026-123492

CVE-2026-123492CVE-2026-123492

Description

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.

Scoring

CVSS 4.9 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Last modified2026-11-06
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.