# CVE-2026-41283: OpenStack Mistral remote code execution via policy bypass

Source: https://junglewise.ai/threats/cve-2026-41283-openstack-mistral-remote-code-execution-via-policy-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-04. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-41283 · Severity: critical · CVSS 9.9 · Published 2026-06-04

OpenStack Mistral, a workflow service used to manage and automate tasks in cloud environments, contains a vulnerability that allows users to bypass security policies. An attacker with basic access can upload and run malicious code on the system's background workers. This could lead to the theft of sensitive service credentials and full control over the workflow automation environment.

Technologies: [mistral (PyPI)](https://junglewise.ai/threats/technologies/pypi-mistral). Vendors: [OpenStack](https://junglewise.ai/threats/vendors/openstack), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-41283 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41283 being exploited in the wild.

**How severe is CVE-2026-41283?** Critical severity, with a CVSS score of 9.9, published 4 June 2026.

**Which products and versions are affected?** OpenStack Mistral >= 20.0.0, < 20.1.1; 21.0.0; 22.0.0, >=20.0.0 <20.1.1, 21.0.0, 22.0.0; mistral (PyPI) ECOSYSTEM:introduced=20.0.0,fixed=20.1.1.

**Is there a fix for CVE-2026-41283?** Yes. mistral (PyPI): upgrade to 20.1.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41283 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-41283?** Check whether you run OpenStack Mistral or mistral (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- mistral (PyPI): upgrade to 20.1.1 or later

  ```sh
  pip install "mistral>=20.1.1"
  ```


## Technical details

A vulnerability in OpenStack Mistral (CVE-2026-41283) stems from a failure to enforce access policies across several API endpoints (CWE-863, CWE-749). This allows an authenticated user with network access to the Mistral API to create public resources and upload arbitrary code. The uploaded code is subsequently executed on Mistral executor workers. Successful exploitation enables remote code execution (RCE) and the potential exfiltration of sensitive service credentials from the worker environment. The issue affects versions 20.0.0 through 22.0.0 and is addressed in version 20.1.1 and subsequent patches.

## Affected products

- OpenStack Mistral >= 20.0.0, < 20.1.1; 21.0.0; 22.0.0

## Identifiers

- CVE-2026-41283
- GHSA-9hfw-w3f4-c4p8
- PYSEC-2026-3486

## Timeline

- 2026-06-03: advisory: OpenStack Security Advisory OSSA-2026-020 released
- 2026-06-04: disclosed: CVE-2026-41283 published
- 2026-07-14: patched: GitHub advisory updated with reviewed status and patch information

## References

- [https://github.com/openstack/mistral/tags](https://github.com/openstack/mistral/tags)
- [https://www.openwall.com/lists/oss-security/2026/06/03/14](https://www.openwall.com/lists/oss-security/2026/06/03/14)
- [http://www.openwall.com/lists/oss-security/2026/06/03/14](http://www.openwall.com/lists/oss-security/2026/06/03/14)
- [https://security.openstack.org/ossa/OSSA-2026-020.html](https://security.openstack.org/ossa/OSSA-2026-020.html)
- [https://access.redhat.com/security/cve/CVE-2026-41283](https://access.redhat.com/security/cve/CVE-2026-41283)

## Related threats

- [OpenStack Mistral DoS](https://junglewise.ai/threats/cve-2018-16848-openstack-mistral-dos)
- [openstack-mistral Discloses the presence of arbitrary files within the filesystem](https://junglewise.ai/threats/cve-2018-16849-openstack-mistral-discloses-the-presence-of-arbitrary-files)