PT-2026-138062

CVE-2026-123492

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Published

2026-11-06

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Updated

2026-11-06

Description by

CVSS 3.1
4.9
Medium
MetricsAV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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.
Exploitability
Fix
Impacts
Researchers
Vendors
Affected products
Weakness enumeration
CWE-476: NULL Pointer Dereference
Related identifiers
CVE-2026-123492
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