CVE-2017-11173: Debian Linux

High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.

Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted example.com domain name and not the malicious example.net domain name, then example.com.example.net (as well as example.com-example.net) would be inadvertently allowed.

Affected products

• Debian Debian Linux: version 9.0 only
• Rack-Cors Project Rack-Cors: before 0.4.1 (fixed in 0.4.1)

Published 2017-07-13. Last modified 2026-06-17.