In OpenStack Mistral through 23.0.0, several of the v2 API write paths resolve the target object with a query that can return another project's resource, then write to it. An authenticated project member can use this to rewrite and un-publish another project's public action definitions and environments. A project administrator can create a workbook whose embedded ad-hoc action or workflow name collides with a resource of another project, which moves that resource into the caller's project and causes the original owner's subsequent updates of it to fail with server errors. Only deployments exposing the Mistral API are affected.
In OpenStack Mistral through 23.0.0, the workflow membership API lets a project that has accepted a share of another project's private workflow create a further membership naming a third project. The new membership row is created with its projectid defaulted to the accepting project rather than the original workflow owner, and thus the owner can neither see nor delete it. The third project can accept this membership (that it had not actually been granted by the owner), and then read and execute the owner's private workflow; only the accepting (not the owning) project can later revoke that access.
In OpenStack Mistral through 23.0.0, the /v2/maintenance API controller clears the request context and calls the maintenance service directly without any policy enforcement. Any holder of a valid Mistral token, regardless of assigned role, can read and change the service's cluster-wide maintenance state. Setting the state to PAUSED stops processing of new workflow and execution objects across all tenant projects until an operator restores it.
In OpenStack Mistral through 23.0.0, the std.sshproxied action passes a caller-supplied proxycommand value directly to paramiko.ProxyCommand() before any SSH connection to a gateway or target host is attempted. An authenticated project member can use the standard action-execution API to submit an arbitrary local command as proxycommand; paramiko starts that command as a subprocess on the executor host under the executor's own service account, independent of whether the SSH connection itself ever succeeds. Only Mistral deployments that permit the std.sshproxied action, the default configuration, are affected.
========================================================================== OSSA-2026-044: Four authorization and privilege vulnerabilities in Mistral ==========================================================================
:Date: October 08, 2026 :CVE: CVE-2026-93858, CVE-2026-93860, CVE-2026-93861, CVE-2026-97147
Affects ~~~~~~~ - Mistral: <20.1.1, ==21.0.0, ==22.0.0, ==23.0.0
Description ~~~~~~~~~~~
Patches ~~~~~~~ - https://review.opendev.org/1009502 (2025.1/epoxy) - https://review.opendev.org/1009503 (2025.1/epoxy) - https://review.opendev.org/1009504 (2025.1/epoxy) - https://review.opendev.org/1009505 (2025.1/epoxy) - https://review.opendev.org/1009506 (2025.1/epoxy) - https://review.opendev.org/1009507 (2025.1/epoxy) - https://review.opendev.org/1009508 (2025.1/epoxy) - https://review.opendev.org/1009509 (2025.1/epoxy) - https://review.opendev.org/1009493 (2025.2/flamingo) - https://review.opendev.org/1009494 (2025.2/flamingo) - https://review.opendev.org/1009495 (2025.2/flamingo) - https://review.opendev.org/1009496 (2025.2/flamingo) - https://review.opendev.org/1009497 (2025.2/flamingo) - https://review.opendev.org/1009498 (2025.2/flamingo) - https://review.opendev.org/1009499 (2025.2/flamingo) - https://review.opendev.org/1009500 (2025.2/flamingo) - https://review.opendev.org/1009484 (2026.1/gazpacho) - https://review.opendev.org/1009485 (2026.1/gazpacho) - https://review.opendev.org/1009486 (2026.1/gazpacho) - https://review.opendev.org/1009487 (2026.1/gazpacho) - https://review.opendev.org/1009488 (2026.1/gazpacho) - https://review.opendev.org/1009489 (2026.1/gazpacho) - https://review.opendev.org/1009490 (2026.1/gazpacho) - https://review.opendev.org/1009491 (2026.1/gazpacho) - https://review.opendev.org/1009476 (2026.2/hibiscus) - https://review.opendev.org/1009477 (2026.2/hibiscus) - https://review.opendev.org/1009478 (2026.2/hibiscus) - https://review.opendev.org/1009479 (2026.2/hibiscus) - https://review.opendev.org/1009480 (2026.2/hibiscus) - https://review.opendev.org/1009481 (2026.2/hibiscus) - https://review.opendev.org/1009482 (2026.2/hibiscus) - https://review.opendev.org/1009483 (2026.2/hibiscus) - https://review.opendev.org/1009468 (2027.1/indri (development)) - https://review.opendev.org/1009469 (2027.1/indri (development)) - https://review.opendev.org/1009470 (2027.1/indri (development)) - https://review.opendev.org/1009471 (2027.1/indri (development)) - https://review.opendev.org/1009472 (2027.1/indri (development)) - https://review.opendev.org/1009473 (2027.1/indri (development)) - https://review.opendev.org/1009474 (2027.1/indri (development)) - https://review.opendev.org/1009475 (2027.1/indri (development))
Credits ~~~~~~~ - Arnaud Morin from OVHcloud (CVE-2026-97147) References ~~~~~~~~~~ - https://launchpad.net/bugs/2160267 (CVE-2026-97147) - https://launchpad.net/bugs/2161277 (CVE-2026-93861) - https://launchpad.net/bugs/2162100 (CVE-2026-93858) - https://launchpad.net/bugs/2162789 (CVE-2026-93860) - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-93858 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-93860 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-93861 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-97147
-- Jeremy Stanley OpenStack Vulnerability Management Team https://security.openstack.org/vmt.html
OpenStack Mistral through 22.0.0 allows Arbitrary Remote Code Execution when the API is exposed. There are endpoints that allow code execution, which can lead to exfiltration of service credentials.
Last updated 6 June 2026
========================================================================================================================== ==========================================================================================================================
:Date: June 03, 2026 :CVE: CVE-2026-41283
Affects ~~~~~~~ - Mistral: >=20.0.0 <20.1.1, ==21.0.0, ==22.0.0
Description ~~~~~~~~~~~ Patches ~~~~~~~ - https://review.opendev.org/991416 (2025.1/epoxy) - https://review.opendev.org/991417 (2025.1/epoxy) - https://review.opendev.org/991418 (2025.1/epoxy) - https://review.opendev.org/991419 (2025.1/epoxy) - https://review.opendev.org/991420 (2025.1/epoxy) - https://review.opendev.org/991421 (2025.1/epoxy) - https://review.opendev.org/991422 (2025.1/epoxy) - https://review.opendev.org/991423 (2025.1/epoxy) - https://review.opendev.org/991408 (2025.2/flamingo) - https://review.opendev.org/991409 (2025.2/flamingo) - https://review.opendev.org/991410 (2025.2/flamingo) - https://review.opendev.org/991411 (2025.2/flamingo) - https://review.opendev.org/991412 (2025.2/flamingo) - https://review.opendev.org/991413 (2025.2/flamingo) - https://review.opendev.org/991414 (2025.2/flamingo) - https://review.opendev.org/991415 (2025.2/flamingo) - https://review.opendev.org/991400 (2026.1/gazpacho) - https://review.opendev.org/991401 (2026.1/gazpacho) - https://review.opendev.org/991402 (2026.1/gazpacho) - https://review.opendev.org/991403 (2026.1/gazpacho) - https://review.opendev.org/991404 (2026.1/gazpacho) - https://review.opendev.org/991405 (2026.1/gazpacho) - https://review.opendev.org/991406 (2026.1/gazpacho) - https://review.opendev.org/991407 (2026.1/gazpacho) - https://review.opendev.org/991392 (2026.2/hibiscus) - https://review.opendev.org/991393 (2026.2/hibiscus) - https://review.opendev.org/991394 (2026.2/hibiscus) - https://review.opendev.org/991395 (2026.2/hibiscus) - https://review.opendev.org/991396 (2026.2/hibiscus) - https://review.opendev.org/991397 (2026.2/hibiscus) - https://review.opendev.org/991398 (2026.2/hibiscus) - https://review.opendev.org/991399 (2026.2/hibiscus)
Credits ~~~~~~~ - Eduardo Gonzalez Gutierrez from Independent (CVE-2026-41283) - Arnaud Morin from OVHcloud (CVE-2026-41283)
References ~~~~~~~~~~ - https://launchpad.net/bugs/2147178 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41283
-- Goutham Pacha Ravi OpenStack Vulnerability Management Team https://security.openstack.org/vmt.html