Security Advisory

CVE-2026-74902

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-18 11:19:34

Last updated 2026-08-18 13:36:31

Assigner VulnCheck

CVSS score not scored

State PUBLISHED

Description

SiYuan before v3.7.4 contains a cross-site scripting vulnerability in the file upload validation flow that fails to escape filenames before inserting them into HTML via insertAdjacentHTML. Attackers can craft a malicious filename containing script payloads that execute with full OS command access when a user drags, drops, or pastes the file into the editor.

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