ESB-2026.3188

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3188 USN-8137-1: Ruby vulnerability 2 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Ruby Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2025-61594 Original Bulletin: https://ubuntu.com/security/notices/USN-8137-1 Comment: CVSS (Max): 7.5 CVE-2025-61594 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) CVSS Source: NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N EPSS (Max): 0.0% (3rd) CVE-2025-61594 2026-03-31 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8137-1: Ruby vulnerability Publication date 31 March 2026 Overview Ruby could be made to expose sensitive information. Releases 25.10 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS 16.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o ruby2.3 - Object-oriented scripting language o ruby2.5 - Object-oriented scripting language o ruby2.7 - Object-oriented scripting language o ruby3.0 - Object-oriented scripting language o ruby3.2 - Object-oriented scripting language o ruby3.3 - Object-oriented scripting language Details It was discovered that the Ruby URI gem did not properly handle sensitive information when combining URIs. A remote attacker could possibly use this issue to leak authentication credentials. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release 25.10 libruby3.3 - 3.3.8-2ubuntu2.1 questing ruby3.3 - 3.3.8-2ubuntu2.1 24.04 LTS libruby3.2 - 3.2.3-1ubuntu0.24.04.7 noble ruby3.2 - 3.2.3-1ubuntu0.24.04.7 22.04 LTS libruby3.0 - 3.0.2-7ubuntu2.12 jammy ruby3.0 - 3.0.2-7ubuntu2.12 libruby2.7 - 2.7.0-5ubuntu1.18+esm4 Ubuntu Pro Fix available with 20.04 LTS Ubuntu Pro . focal ruby2.7 - 2.7.0-5ubuntu1.18+esm4 Ubuntu Pro Fix available with Ubuntu Pro . libruby2.5 - 2.5.1-1ubuntu1.16+esm7 Ubuntu Pro Fix available with 18.04 LTS Ubuntu Pro . bionic ruby2.5 - 2.5.1-1ubuntu1.16+esm7 Ubuntu Pro Fix available with Ubuntu Pro . libruby2.3 - 2.3.1-2~ubuntu16.04.16+esm12 Ubuntu Pro Fix available with Ubuntu Pro . 16.04 LTS ruby2.3 - 2.3.1-2~ubuntu16.04.16+esm12 Ubuntu Pro Fix available xenial with Ubuntu Pro . ruby2.3-tcltk - 2.3.1-2~ubuntu16.04.16+esm12 Ubuntu Pro Fix available with Ubuntu Pro . --------------------------------------------------------------------------------- References o CVE-2025-61594 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================