CVE-2026-73608

CRITICAL
INFO Priority: 0.03 BB Relevance: 78/100
Published: 2026-08-13 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: None
VC: High
VI: None
VA: None

Description

SiYuan's development branch (endpoint introduced by commit 9b8e8956f, not present in v3.7.3 or master, patched in v3.7.4-alpha.3) contains a missing-authorization vulnerability in the /api/av/getAttributeViewSearchTarget endpoint. The route is registered with CheckAuth only and performs no authorization checks (no CheckReadonly, no publish-access or encrypted-notebook gating). Given a database identifier taken from a published page and a keyword, an anonymous reader can query the endpoint to retrieve matching database row content, including rows that publish filters (FilterAttributeViewByPublishAccess) would otherwise withhold. No released stable version is affected.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
siyuan-note siyuan 3.7.4-alpha.2 < 3.7.4-alpha.3
siyuan-note siyuan 3.7.4-alpha.2 < 3.7.4-alpha.3

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.2 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

EPSS — Exploitation Probability

0.30%
Raw Score 0.003050
Percentile 23.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00305
2026-10-28
0.00305

Intelligence Sources

mitre ref →
nvd ref →