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CVE-2026-82650— SiYuan before v3.8.1 Path Traversal via /api/template/render

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.

SiYuan是SiYuan团队开源的一个以隐私为先的个人知识管理系统。 SiYuan 3.8.0版本存在权限许可和访问控制问题漏洞，该漏洞源于RenderTemplate函数对路径验证不充分，未排除敏感路径，可能导致经过身份验证的攻击者读取敏感工作区文件，包括包含API令牌和Cookie签名密钥的conf/conf.json文件。

CVSS 4.4 · Medium EPSS 0.35% · P27

Affected Version Matrix 2

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.8.1 affected
3.8.1 unaffected
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I. Basic Information for CVE-2026-82650

Vulnerability Information
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Vulnerability Title
SiYuan before v3.8.1 Path Traversal via /api/template/render
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan 3.8.0 contains a path traversal / sensitive file exposure vulnerability in the RenderTemplate function (kernel/model/template.go), reachable via the POST /api/template/render endpoint (kernel/api/template.go). The endpoint restricts the supplied path only to the workspace directory (util.IsAbsPathInWorkspace) but, unlike the file API's refuseToAccess() blocklist, applies no sensitive-path exclusion. This allows an authenticated attacker to read sensitive workspace files, including conf/conf.json, which contains the API token and cookie signing key. The issue is fixed in v3.8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
将资源暴露给错误范围
Source: CVE Program / CVE List V5
Vulnerability Title
SiYuan 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队开源的一个以隐私为先的个人知识管理系统。 SiYuan 3.8.0版本存在权限许可和访问控制问题漏洞，该漏洞源于RenderTemplate函数对路径验证不充分，未排除敏感路径，可能导致经过身份验证的攻击者读取敏感工作区文件，包括包含API令牌和Cookie签名密钥的conf/conf.json文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan 0 ~ 3.8.1 -

II. Public POCs for CVE-2026-82650

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III. Intelligence Information for CVE-2026-82650

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Vendor Advisories for CVE-2026-82650 (2)

Same Patch Batch · siyuan-note · 2026-08-30 · 6 CVEs total

CVE-2026-82654 8.9 HIGH SiYuan before v3.8.1 Stored XSS via block name
CVE-2026-82653 8.9 HIGH SiYuan before v3.8.1 Stored XSS via confirmDialog
CVE-2026-82649 7.0 HIGH SiYuan before 3.8.1 Local Privilege Escalation via Uncontrolled Search Path
CVE-2026-82652 5.3 MEDIUM SiYuan before v3.8.1 Information Disclosure via Publish Access
CVE-2026-82651 4.9 MEDIUM SiYuan before v3.8.1 Missing Authorization via /history and /repo/diff

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-668

V. Comments for CVE-2026-82650

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