VULNERABILITY INTELLIGENCE
CVE-2026-74903
CVSS score4.3 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-08-18
Last modified2026-10-22
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Description
SiYuan before v3.7.4 contains an insufficient access control vulnerability in the /api/lute/spinBlockDOM endpoint, which is guarded only by CheckAuth middleware instead of CheckAdminRole like its sibling endpoint. Authenticated users with RoleEditor or RoleReader roles can invoke the endpoint to transform arbitrary DOM input, and large payloads cause endpoint starvation through per-path mutex serialization.
Weakness classification
- disclosure@vulncheck.com: CWE-400