SiYuan before v3.7.4 Authentication Bypass via Graph Endpoints

published 2026-08-12 2 mo ago modified 2026-10-24 15 d ago also GHSA-vpjw-wf5h-cgpq , GO-2026-6407 , EUVD-2026-57464

cvss: 8.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

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.

Patch / fix

fixed in 2 distros 2 links 1

go github.com/siyuan-note/siyuan/kernel 0.0.0-20260724091654-82e9ded423e4
siyuan-note siyuan 3.7.4

suse opensuse

govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260916T180043-160000.1.1

suse advisories SUSE-SU-2026:23855-1 SUSE-SU-2026:23863-1

govulncheck-vulndb openSUSE Leap 16.0 0.0.20260916T180043-160000.1.1

opensuse advisories openSUSE-SU-2026:21897-1

github.com/siyuan-note/siyuan@82e9ded commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 mo ago (2026-08-12)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.2	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
CNA	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CNA	4.0	9.2	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
GitHub	3.1	8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/siyuan-note/siyuan/kernel	<0.0.0-20260724091654-82e9ded423e4	0.0.0-20260724091654-82e9ded423e4

Affected products

siyuan-note siyuan

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-862 Missing Authorization

References

github.com /siyuan-note/siyuan/commit/82e9ded423e45eabcc96010abd30c0f96bfe0323
web
github.com /siyuan-note/siyuan/security/advisories/GHSA-vpjw-wf5h-cgpq
vendor-advisory, web, advisory
vulncheck.com /advisories/siyuan-before-authentication-bypass-via-graph-endpoints
third-party-advisory, web
nvd.nist.gov /vuln/detail/CVE-2026-72804
advisory
github.com /siyuan-note/siyuan
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary