SiYuan before v3.7.4 Path Traversal via getUniqueFilename

Advisories

SiYuan before v3.7.4 Path Traversal via getUniqueFilename

severity: medium
date: 8/13/2026
Affecting: siyuan >= 0, < 3.7.4
CVE: CVE-2026-73605
CWE: CWE-862 Missing Authorization
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
References: GitHub Security Advisory (GHSA-hf8h-97gm-4x2p)
Credit: Shirshakhtml
Description: SiYuan versions before v3.7.4 contain a path traversal vulnerability in the getUniqueFilename endpoint that allows anonymous readers to probe filesystem existence without validation or confinement. Attackers can supply arbitrary absolute paths to determine whether files and directories exist on the host, enabling reconnaissance of the filesystem layout and installed software.

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