CVE-2020-8184: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is possible for an attacker to forge a secure or host-only cookie prefix.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Rack Project Rack: before 2.1.4 (fixed in 2.1.4); from 2.2.0, before 2.2.3 (fixed in 2.2.3)

Published 2020-06-19. Last modified 2026-06-17.