Description
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.
Published: 2026-08-22
Score: 5.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 22 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description 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.
Title SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
First Time appeared B3log
B3log siyuan
Weaknesses CWE-345
CPEs cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Vendors & Products B3log
B3log siyuan
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L'}

cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L'}

Subscriptions

B3log Siyuan
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-22T12:26:41.933Z

Reserved: 2026-07-13T16:39:22.250Z

Link: CVE-2026-62204

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-22T13:16:39.547

Modified: 2026-08-22T13:16:39.547

Link: CVE-2026-62204

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-22T14:00:17Z

Weaknesses