========================================================================== Ubuntu Security Notice USN-8422-1 June 11, 2026
mistral vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Mistral could be made to expose sensitive information or run code. Software Description: - mistral: OpenStack Workflow Service Details: Eduardo Gonzalez Gutierrez and Arnaud Morin discovered that Mistral did not properly enforce access policies on some API endpoints. An attacker could possibly execute arbitrary code on a Mistral worker and possibly extract sensitive data including service credentials from it. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS mistral-api 22.0.0-0ubuntu1.1 mistral-common 22.0.0-0ubuntu1.1 mistral-engine 22.0.0-0ubuntu1.1 mistral-event-engine 22.0.0-0ubuntu1.1 mistral-executor 22.0.0-0ubuntu1.1 python3-mistral 22.0.0-0ubuntu1.1 Ubuntu 25.10 mistral-api 21.0.0-0ubuntu1.1 mistral-common 21.0.0-0ubuntu1.1 mistral-engine 21.0.0-0ubuntu1.1 mistral-event-engine 21.0.0-0ubuntu1.1 mistral-executor 21.0.0-0ubuntu1.1 python3-mistral 21.0.0-0ubuntu1.1 Ubuntu 24.04 LTS mistral-api 18.0.1-0ubuntu1.1 mistral-common 18.0.1-0ubuntu1.1 mistral-engine 18.0.1-0ubuntu1.1 mistral-event-engine 18.0.1-0ubuntu1.1 mistral-executor 18.0.1-0ubuntu1.1 python3-mistral 18.0.1-0ubuntu1.1 Ubuntu 22.04 LTS mistral-api 14.0.0-0ubuntu1.1 mistral-common 14.0.0-0ubuntu1.1 mistral-engine 14.0.0-0ubuntu1.1 mistral-event-engine 14.0.0-0ubuntu1.1 mistral-executor 14.0.0-0ubuntu1.1 python3-mistral 14.0.0-0ubuntu1.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8422-1 CVE-2026-41283 Package Information: https://launchpad.net/ubuntu/+source/mistral/22.0.0-0ubuntu1.1 https://launchpad.net/ubuntu/+source/mistral/21.0.0-0ubuntu1.1 https://launchpad.net/ubuntu/+source/mistral/18.0.1-0ubuntu1.1 https://launchpad.net/ubuntu/+source/mistral/14.0.0-0ubuntu1.1
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