========================================================================== Ubuntu Security Notice USN-8190-1 April 20, 2026 ruby-rack-session vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 Summary: Rack::Session could allow unintended access to network services. Software Description: - ruby-rack-session: Session management implementation for Rack Details: SeungMyung Lee discovered that Rack::Session did not properly reject cookies upon decryption failure. A remote attacker could use this issue to manipulate session contents and possibly gain unauthorized access. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 ruby-rack-session 2.1.1-0.1ubuntu0.1 After a standard system update you need to restart ruby-rack-session to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8190-1 CVE-2026-39324 Package Information: https://launchpad.net/ubuntu/+source/ruby-rack-session/2.1.1-0.1ubuntu0.1
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