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Ubuntu 25.10 Rack Critical Path Traversal Code Execution Vulnerabilities

ubuntu
Calendar Grey February 26, 2026
Dist Ubuntu Esm H88
Several Rack security fixes are available for Ubuntu 20.04 to 25.10. Critical updates recommended to mitigate risks.
Several security issues were fixed in Rack.

Summary

Several security issues were fixed in Rack.

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory critical Ubuntu arbitrary code path traversal ruby rack

Update Instructions

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

Ubuntu 25.10
  ruby-rack                       3.1.16-0.1ubuntu0.2

Ubuntu 24.04 LTS
  ruby-rack                       2.2.7-1ubuntu0.6

Ubuntu 22.04 LTS
  ruby-rack                       2.1.4-5ubuntu1.2+esm2
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  ruby-rack                       2.0.7-2ubuntu0.1+esm9
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-8066-1

CVE-2026-22860, CVE-2026-25500

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8066-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu arbitrary code path traversal ruby rack

Package Information

https://launchpad.net/ubuntu/+source/ruby-rack/3.1.16-0.1ubuntu0.2
https://launchpad.net/ubuntu/+source/ruby-rack/2.2.7-1ubuntu0.6

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