CVE-2026-73041

EUVD-2026-59793
SiYuan versions before v3.7.4 fail to validate or escape annotation fields written to disk by the setFileAnnotation endpoint. Attackers can inject malicious markup into annotation fields that execute as script in the PDF renderer with full Node.js access when a user opens an annotated PDF.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9 CRITICAL
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 14.57%
Common Weakness Enumeration
References
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-fqpw-c3pj-w8g9
https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-pdf-annotations