CVE-2024-26146: Debian Linux

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.

Affected products

• Debian Debian Linux: version 10.0 only
• Rack Rack: from 0.4, before 2.0.9.4 (fixed in 2.0.9.4); from 2.1.0, before 2.1.4.4 (fixed in 2.1.4.4); from 2.2.0, before 2.2.8.1 (fixed in 2.2.8.1)

Published 2024-02-29. Last modified 2026-06-17.