Is CVE-2026-109310 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109310?

CVE-2026-109310 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-109310

Description

SiYuan v3.1.12 before v3.8.6 fails to restrict the Sprig template function map in the /api/icon/getDynamicIcon content parameter, allowing resource exhaustion. A publish reader, or anyone when publish auth is disabled, can use uncapped functions like until to OOM-kill the kernel with one request.