CVE-2026-109310 Details
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.
A denial-of-service vulnerability has been identified in SiYuan versions 3.1.12 prior to 3.8.6. The issue arises in the '/api/icon/getDynamicIcon' endpoint, where the 'content' parameter is parsed as a Go text/template. This parsing allows the use of Sprig template functions, including uncapped functions like 'until', which can be exploited to cause resource exhaustion. A publish reader, or anyone when publish authentication is disabled, can send a request that overwhelms the server's memory, leading to an 'Out of Memory' (OOM) condition that kills the kernel process.
Users can upgrade to SiYuan version 3.8.6, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 12, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cxwr-r7cq-xw52 | CISA-ADP | AdvisoryExploitTechnical AnalysisVendor |
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cxwr-r7cq-xw52 | [email protected] | AdvisoryExploitTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/siyuan-3.1.12-before-3.8.6-denial-of-service-via-getdynamicicon-template | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | <= 3.8.5 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 12, 2026 | New CVE Received | [email protected] |