CVE-2026-62204— SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
Quick assessment
Affected
siyuan-note siyuan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
思源笔记（SiYuan）在 v3.7.4 之前的版本中，在安装端点（bazaar install endpoints）存在未对 packageName 与下载的实际包内容进行有效性校验的安全漏洞。具有同源访问权限的攻击者可以通过提供不匹配的 packageName 和 repoURL 参数，覆盖已有的受信任插件，从而实现在应用重启后保持持久化控制。
Possible ATT&CK Techniques 1 AI
T1195 · Supply Chain CompromiseAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| siyuan-note | siyuan | < 3.7.4 |
affected |
3.7.4 |
unaffected |
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I. Basic Information for CVE-2026-62204
Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| siyuan-note | siyuan | 0 ~ 3.7.4 | - |
|
II. Public POCs for CVE-2026-62204
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-62204 (2)
-
-
🔗 SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install | Advisories | VulnCheck third-party-advisory
Same Patch Batch · siyuan-note · 2026-08-22 · 4 CVEs total
| CVE-2026-60084 | 8.7 HIGH | SiYuan before v3.7.4 Arbitrary File Deletion via removeTemplate |
| CVE-2026-60083 | 4.9 MEDIUM | SiYuan before v3.8.0 Incomplete Path Blocklist via MCP file tool |
| CVE-2026-59809 | 4.9 MEDIUM | SiYuan before v3.8.0 Secret Exfiltration via http_request URL |
IV. Related Vulnerabilities
Same product: siyuan
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CVE-2026-60084
SiYuan before v3.7.4 Arbitrary File Deletion via removeTempl -
CVE-2026-60083
SiYuan before v3.8.0 Incomplete Path Blocklist via MCP file -
CVE-2026-59809
SiYuan before v3.8.0 Secret Exfiltration via http_request UR -
CVE-2026-77086
SiYuan before v3.7.4 Path Traversal via packageName -
CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts
Same vendor: siyuan-note
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CVE-2026-60084
SiYuan before v3.7.4 Arbitrary File Deletion via removeTempl -
CVE-2026-60083
SiYuan before v3.8.0 Incomplete Path Blocklist via MCP file -
CVE-2026-59809
SiYuan before v3.8.0 Secret Exfiltration via http_request UR -
CVE-2026-77086
SiYuan before v3.7.4 Path Traversal via packageName -
CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts
Same weakness: CWE-345
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CVE-2026-68554
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V. Comments for CVE-2026-62204
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