CVE-2026-62204

MEDIUM 6.6

SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install

CVSS Score

6.6

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan versions before v3.7.4 fail to validate that packageName matches the downloaded package content in bazaar install endpoints. Attackers with same-origin access can overwrite existing trusted plugins by supplying mismatched packageName and repoURL parameters, achieving persistence across application restarts.

CWE	CWE-345
Vendor	siyuan-note
Product	siyuan
Published	Aug 22, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

Low

Affected Versions

siyuan-note / siyuan

0 < 3.7.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rpx2-p6hp-x5gj vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-plugin-overwrite-via-bazaar-install

Credits

🔍 alham-rizvi