CVE-2026-85580

MediumCVSS 6.5/10Last modified Sep 8, 2026

Description

SiYuan versions before v3.8.2 contain a path guard bypass vulnerability in the MCP file-access handler that uses case-sensitive matching on Linux filesystems. Attackers can read the protected publishAccess.json file by requesting case-variant paths like PublishAccess.json to disclose sensitive publish-access configuration and metadata.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published: Sep 4, 2026
Last modified: Sep 8, 2026
NVD status: Deferred

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