CVE-2026-72804

SiYuan before v3.7.4 Authentication Bypass via Graph Endpoints

HIGH
8.6
CVSS Score
Published: August 12, 2026 at 07:07 PM UTC
Updated: October 24, 2026 at 03:10 PM UTC
2 products affected across 2 vendorsSiyuanSiyuan

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

SiYuan versions before v3.7.4 fail to validate publish-password tier in getGraph and getLocalGraph endpoints, allowing anonymous readers to retrieve block-level content of password-protected documents. Attackers can call these endpoints without supplying a password to read protected document content and the complete reference topology.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.7.4
Affected range stops below 3.7.4, so it looks safe — our inference, not a vendor statement
0 ≤ v < 3.7.40
Vendor states this is fixed in 3.7.4 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-200

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