CVE-2026-77086— SiYuan before v3.7.4 Path Traversal via packageName
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（SiYuan）在 v3.7.4 版本之前存在安全漏洞。该漏洞源于在 Bazaar 的“安装”和“卸载”端点中，未对 参数进行充分验证，导致认证管理员可通过目录遍历序列实现路径遍历攻击。拥有管理员权限的攻击者可以通过提供构造的 值，在安装操作中向任意位置写入任意文件，或在卸载操作中递归删除目录。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting InterpreterAffected 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-2026-77086
Vulnerability Information
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Vulnerability Title
SiYuan before v3.7.4 Path Traversal via packageName
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.7.4 fails to validate the packageName parameter in Bazaar install and uninstall endpoints, allowing authenticated administrators to perform path traversal via directory traversal sequences. Attackers with admin access can write arbitrary files to any location via install operations or recursively delete directories via uninstall operations by supplying crafted packageName values.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
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-2026-77086
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-77086 (1)
Other References for CVE-2026-77086 (1)
-
🔗 SiYuan before v3.7.4 Path Traversal via packageName | Advisories | VulnCheck third-party-advisory
IV. Related Vulnerabilities
Same product: siyuan
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CVE-2026-62204
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CVE-2026-59809
SiYuan before v3.8.0 Secret Exfiltration via http_request UR -
CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts
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-
CVE-2026-62204
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CVE-2026-60084
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SiYuan before v3.8.0 Secret Exfiltration via http_request UR -
CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts
Same weakness: CWE-22
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V. Comments for CVE-2026-77086
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