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CVE-2026-11345— Improper Authentication Bypass in linqi CDN File Access

Quick assessment

Affected
linqi GmbH linqi
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.

Linqi是德国Linqi公司的一款结合真人语言交流与AI反馈的英语口语练习平台。 Linqi存在安全漏洞，该漏洞源于/api/Cdn/GetFile端点身份验证不当，导致未经身份验证的远程攻击者绕过文件访问控制，但实际安全影响可忽略。

AI Predicted 3.1 Difficulty: Easy EPSS 0.41% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
linqi GmbH linqi < 1.4.8.6 affected
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I. Basic Information for CVE-2026-11345

Vulnerability Information
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Vulnerability Title
Improper Authentication Bypass in linqi CDN File Access
Source: CVE Program / CVE List V5
Vulnerability Description
An Improper Authentication vulnerability in the /api/Cdn/GetFile endpoint of linqi allows unauthenticated, remote attackers to bypass file access controls. The ValidateAnonFileAccess function incorrectly grants access if an 'AnonFile' query parameter containing exactly 256 characters is provided. While this flaw allows bypassing the intended authorization check, the actual security impact is negligible; the exposed resources are strictly limited to minified JavaScript and CSS files that contain no sensitive data and are already publicly accessible via a standard CDN.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linqi 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linqi是德国Linqi公司的一款结合真人语言交流与AI反馈的英语口语练习平台。 Linqi存在安全漏洞，该漏洞源于/api/Cdn/GetFile端点身份验证不当，导致未经身份验证的远程攻击者绕过文件访问控制，但实际安全影响可忽略。
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
linqi GmbH linqi 0 ~ 1.4.8.6 -

II. Public POCs for CVE-2026-11345

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III. Intelligence Information for CVE-2026-11345

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Vendor Advisories for CVE-2026-11345 (1)

Same Patch Batch · linqi GmbH · 2026-06-05 · 4 CVEs total

CVE-2026-11369 IDOR in Comment API Allows Cross-Process Comment Read and Write
CVE-2026-11346 Server-Side Request Forgery (SSRF) allowing Internal Network Probing in linqi
CVE-2026-11347 Hardcoded Cryptographic Keys and Weak IV Generation in linqi

IV. Related Vulnerabilities

Same product: linqi
Same vendor: linqi GmbH
Same weakness: CWE-287

V. Comments for CVE-2026-11345

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