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CVE-2026-74868— SiYuan before 3.7.4 Brute-Force Authentication via Publish Service

CVSS 7.5 · High EPSS 0.38% · P31

Affected Version Matrix 2

VendorProductVersion RangeStatus
siyuan-notesiyuan< 3.7.4affected
3.7.4unaffected
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I. Basic Information for CVE-2026-74868

Vulnerability Information
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Vulnerability Title
SiYuan before 3.7.4 Brute-Force Authentication via Publish Service
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan versions before 3.7.4 contain an unthrottled brute-force vulnerability in the Publish Service Basic Auth implementation (PublishServiceTransport.RoundTrip() in kernel/server/proxy/publish.go). The Publish Service runs on a separate, unauthenticated-by-default listener (default TCP port 6808) and gates named publish-viewer accounts (Conf.Publish.Auth.Accounts) with Basic Auth that has no rate limiting, per-account lockout, or backoff. Unauthenticated remote attackers can submit unlimited password guesses against named accounts to gain access to published notes/notebooks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
SiYuan 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队开源的一款文档管理软件。 SiYuan 3.7.4之前版本存在授权问题漏洞，该漏洞源于Publish Service Basic Auth实现未限制暴力破解尝试，缺少速率限制、账户锁定或退避机制，可能导致未经身份验证的远程攻击者无限次猜测密码，访问已发布的笔记或笔记本。
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

VendorProductAffected VersionsCPESubscribe
siyuan-notesiyuan 0 ~ 3.7.4 -

II. Public POCs for CVE-2026-74868

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III. Intelligence Information for CVE-2026-74868

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Vendor Advisories for CVE-2026-74868 (2)

Same Patch Batch · siyuan-note · 2026-08-17 · 7 CVEs total

CVE-2026-747999.3 CRITICALSiYuan before 3.7.4 Unauthenticated Debug Endpoint Information Disclosure
CVE-2026-748009.0 CRITICALSiYuan before v3.7.4 Stored XSS via assets endpoint
CVE-2026-747988.7 HIGHSiYuan kernel Path Traversal via database_clean MCP tool
CVE-2026-748018.2 HIGHSiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
CVE-2026-748028.2 HIGHSiYuan 3.7.3 Cross-Site WebSocket Hijacking via network proxy
CVE-2026-748674.2 MEDIUMSiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-307

V. Comments for CVE-2026-74868

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