Ubuntu alert USN-8190-2 (ruby-rack-session)

From:
             
 
noreply+usn-bot@canonical.com
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8190-2] Rack::Session vulnerability
Date:
             
 
Tue, 28 Apr 2026 14:24:46 +0000
Message-ID:
             
 
<E1wHjMk-0000KJ-T4@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8190-2
April 28, 2026

ruby-rack-session vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS

Summary:

Rack::Session could allow unintended access to network services.

Software Description:
- ruby-rack-session: Session management implementation for Rack

Details:

USN-8190-1 fixed a vulnerability in Rack::Session. This update provides the
corresponding update for Ubuntu 26.04 LTS.

Original advisory 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 26.04 LTS
  ruby-rack-session               2.1.1-0.1ubuntu0.26.04.1

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-8190-2
  https://ubuntu.com/security/notices/USN-8190-1
  CVE-2026-39324

Package Information:
  https://launchpad.net/ubuntu/+source/ruby-rack-session/2....


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