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Critical · 9.0 CVE-2026-73041 EUVD-2026-59793GHSA-vmpw-83v9-prcg

SiYuan before v3.7.4 Remote Code Execution via PDF Annotations

Published Aug 15, 2026 · Updated Aug 17, 2026 · Assigned by VulnCheck

Description

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.

Affected products

VendorProductAffectedFixed
siyuan-note siyuan < 3.7.4 3.7.4

References