---
title: "CVE-2026-41283: OpenStack Mistral allows Arbitrary Remote Code Execution when the API is exposed"
url: https://erroneo.us/security/cve/CVE-2026-41283/
description: "CVE-2026-41283 (mistral (PyPI)): OpenStack Mistral through 22.0.0 allows Arbitrary Remote Code Execution when the API is exposed. There are endpoints that…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-04
date_modified: 2026-07-15
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-41283"
kev: false
cvss: 9.9
epss: 0.00915
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-41283: OpenStack Mistral allows Arbitrary Remote Code Execution when the API is exposed

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes mistral (PyPI) >= 20.0.0, < 20.1.1, fixed in 20.1.1 ; mistral (PyPI) = 21.0.0, no fixed version listed ; mistral (PyPI) = 22.0.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- PyPI `mistral` >= 20.0.0, < 20.1.1 → fixed: 20.1.1
- PyPI `mistral` = 21.0.0 → fixed: none listed
- PyPI `mistral` = 22.0.0 → fixed: none listed

## Affected products (CVE record)

- OpenStack Mistral: 20.0.0 < 20.1.1, 21.0.0, 22.0.0

## Severity

- mitre CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- redhat-SADP CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.92% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-9hfw-w3f4-c4p8](https://github.com/advisories/GHSA-9hfw-w3f4-c4p8)
- [CVE.org record CVE-2026-41283](https://www.cve.org/CVERecord?id=CVE-2026-41283)
- [NVD entry CVE-2026-41283](https://nvd.nist.gov/vuln/detail/CVE-2026-41283)
- [github.com](https://github.com/openstack/mistral/tags)
- [openwall.com](https://www.openwall.com/lists/oss-security/2026/06/03/14)
- [security.openstack.org](https://security.openstack.org/ossa/OSSA-2026-020.html)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/06/03/14)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2026-41283)
- [RHBZ#2484607](https://bugzilla.redhat.com/show_bug.cgi?id=2484607)
- [security.access.redhat.com](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41283.json)

---
Source page: https://erroneo.us/security/cve/CVE-2026-41283/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt