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

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-05 · updated 2026-06-17
Weakness: CWE-287

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.

Affected products

linqi GmbH linqi: before 1.4.8.6 — fixed in 1.4.8.6

How to fix

Upgrade to a fixed version: linqi GmbH linqi 1.4.8.6. Check the vendor advisory for mitigations.

References

https://linqi.help/en/reference/security/security-advisories/#security-advisory-improper-authentication-bypass-in-cdn-file-access-in-linqi

Get alerted when CVE-2026-11345 or the next vulnerability affects your stack