SiYuan before v3.7.3 Path Traversal via unvalidated avID

Advisories

SiYuan before v3.7.3 Path Traversal via unvalidated avID

severity: high
date: 8/3/2026
Affecting: siyuan >= 0, < 3.7.3
CVE: CVE-2026-69086
CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS: 8.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
References: GitHub Security Advisory (GHSA-7hm9-v7vf-7g4w)
Credit: Shirshakhtml
Description: SiYuan versions before v3.7.3 fail to validate the avID parameter on all code branches in attribute-view read endpoints, allowing attackers to construct traversal paths that escape the storage directory. Authenticated users with RoleReader permissions or anonymous clients when publish authentication is disabled can read JSON files outside the attribute-view directory to disclose cross-scope database content.

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