CVE-2026-32704: b3log siyuan Improper Authorization
Vulnerability summary
CVE-2026-32704 is a medium (CVSS 6.5) Improper Authorization vulnerability in b3log siyuan. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.9% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 13-03-2026PublishedVulnerability first disclosed.
- 16-03-2026Last modifiedVulnerability information updated.
Description
SiYuan is a personal knowledge management system. Prior to 3.6.1, POST /api/template/renderSprig lacks model.CheckAdminRole, allowing any authenticated user to execute arbitrary SQL queries against the SiYuan workspace database and exfiltrate all note content, metadata, and custom attributes. This vulnerability is fixed in 3.6.1.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · GoEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
+0.12 pp
From 0.25% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundSiyuan
Maturity: poc
Weaknesses
CWE · root cause- CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
- CWE-732Incorrect Permission Assignment for Critical ResourceThe product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.
Affected systems
B3log1 product
- siyuan< 3.6.1
Github.com/siyuan-note/siyuan1 product
- kernel< 3.6.1 | All versions (No fix recorded)
Siyuan-note1 product
- siyuan< 3.6.1
3 vendors · 3 products
References
4 links- github.com/siyuan-note/siyuan/security/advisories/GHSA-4j3x-hhg2-fm2xX Refsource CONFIRMWEBAdvisoryExploitVendor Advisory
