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CVE-2026-30926

SiYuan Note publish service authorization bypass allows low-privilege users to modify notebook content

Published: Mar 9, 2026Updated: Mar 13, 2026 Sources: CVE List NVD GHSACWE-284
NVD MITRE
7.1CVSSHIGH
EPSS Score
0.3%
Top 77.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

SiYuan: Authorization Bypass Allows Low-Privilege Publish User to Modify Notebook Content via /api/block/appendHeadingChildren

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-284CWE-862

Affected Products

github.com/siyuan-note/siyuan/kernelGoOSS Libraries
siyuansiyuan-note
siyuanb3log
On-premWeb App
Web & CMS Plugins / cms-core
gopackage-ecosystemOSS Libraries
b3logoss-projectWeb & CMS Pluginsaka b3log

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f9cq-v43p-v523
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-30926
nvd.nist.gov
https://github.com/siyuan-note/siyuan
github.com

Timeline

Published
Mar 9, 2026
Last Updated
Mar 13, 2026

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