CVE-2017-17742: Debian Linux

Medium severity, CVSS 5.3. EPSS: 5.5% chance of exploitation in the next 30 days.

Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 allows an HTTP Response Splitting attack. An attacker can inject a crafted key and value into an HTTP response for the HTTP server of WEBrick.

Affected products

• Debian Debian Linux: version 7.0 only
• Ruby-Lang Ruby: from 2.2.0, before 2.2.10 (fixed in 2.2.10); from 2.3.0, before 2.3.7 (fixed in 2.3.7); from 2.4.0, before 2.4.4 (fixed in 2.4.4); from 2.5.0, before 2.5.1 (fixed in 2.5.1); version 2.6.0 only

Published 2018-04-03. Last modified 2026-06-17.