CVE-2026-85578: Missing Authorization in siyuan-note siyuan
Description
SiYuan versions up to 3.8.1 have an authorization bypass vulnerability in the /api/file/getFile endpoint. This flaw allows users with reader roles to access files from notebooks that are explicitly set as not visible (Visible:false). By knowing the hidden notebook identifier and file path, attackers can retrieve private workspace files, including notebook metadata and internal configuration.
CVSS v4.0
Score 7.1high
Affected software
siyuan-note
siyuan
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85578 describes an authorization bypass vulnerability in SiYuan (up to version 3.8.1) affecting the /api/file/getFile endpoint. The vulnerability enables users with reader privileges to bypass visibility restrictions on notebooks marked as Visible:false. Attackers who know the hidden notebook identifier and file path can access private files, including sensitive metadata and internal configuration data. The CVSS 4.0 score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required beyond reader role, and no user interaction needed.
Potential Impact
An attacker with reader role privileges can access private files from notebooks that should be hidden, potentially exposing sensitive notebook metadata and internal configuration. This could lead to unauthorized disclosure of confidential information within the workspace.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T10:56:22.464Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9aad9eacd9273b4981d6e3
Added to database: 09/04/2026, 11:38:06 UTC
Last enriched: 10/09/2026, 21:14:08 UTC
Last updated: 10/17/2026, 18:48:23 UTC
Views: 63
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.