Medium severity · published Oct 12, 2026
CVE-2026-109310
SiYuan v3.1.12 before v3.8.6 Denial of Service via getDynamicIcon Template
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
siyuan · siyuan-note
3.1.12 before 3.8.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109310
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109310
vendor-advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cxwr-r7cq-xw52
third-party-advisory
https://www.vulncheck.com/advisories/siyuan-3.1.12-before-3.8.6-denial-of-service-via-getdynamicicon-template
More from siyuan
10.0
CVE-2026-72811
SiYuan before v3.7.4 SQL Injection via backlink search
10.0
CVE-2026-69085
SiYuan before v3.7.3 SQL Injection via searchDocs
10.0
CVE-2026-69084
SiYuan before v3.7.3 SQL Injection via searchEmbedBlock
10.0
CVE-2026-69083
SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent
10.0
CVE-2026-66012
SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP