USN-8066-1: Rack vulnerabilities

Publication date

26 February 2026

Overview

Several security issues were fixed in Rack.


Packages

  • ruby-rack - modular Ruby webserver interface

Details

Minh Pham Quang discovered that Rack did not correctly handle parsing
certain paths, which could lead to a path traversal attack. An attacker
could possibly use this issue to leak sensitive information.
(CVE-2026-22860)

Ali Firas discovered that Rack did not correctly sanitize certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-25500)

Minh Pham Quang discovered that Rack did not correctly handle parsing
certain paths, which could lead to a path traversal attack. An attacker
could possibly use this issue to leak sensitive information.
(CVE-2026-22860)

Ali Firas discovered that Rack did not correctly sanitize certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-25500)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.10 questing ruby-rack –  3.1.16-0.1ubuntu0.2
24.04 LTS noble ruby-rack –  2.2.7-1ubuntu0.6
22.04 LTS jammy ruby-rack –  2.1.4-5ubuntu1.2+esm2  
20.04 LTS focal ruby-rack –  2.0.7-2ubuntu0.1+esm9  

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