What is CVE-2026-109310?

CVE-2026-109310 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-10-12.

How severe is CVE-2026-109310?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Siyuan-Note Siyuan

CVE-2026-109310

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.

Published 2026-10-12 · last modified 2026-10-12.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Siyuan-Note Siyuan

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/siyuan-note/siyuan/security/advisories/GHSA-cxwr-r7cq-xw52 (vendor-advisory)
www.vulncheck.com/advisories/siyuan-3.1.12-before-3.8.6-denial-of-service-via-g… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109310?: CVE-2026-109310 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-10-12.
How severe is CVE-2026-109310?: Medium severity. CVSS v3 base score is 6.5 out of 10.