Skip to content
Fencer Vulns
critical 9.9

CVE-2026-41283 json

OpenStack Mistral allows Arbitrary Remote Code Execution when the API is exposed

published 2026-06-04 5 mo ago modified 2026-07-23 3 mo ago also GHSA-9hfw-w3f4-c4p8 , PYSEC-2026-3486 , EUVD-2026-34201

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi mistral 20.1.1
  • OpenStack Mistral 20.1.1
  • mistral Debian 12 15.0.0-1+deb12u1
  • mistral Debian 13 20.0.0-2+deb13u1
  • mistral Debian 14 22.0.0-3

debian advisories DEBIAN-CVE-2026-41283

  • mistral Ubuntu 22.04 LTS 14.0.0-0ubuntu1.1
  • mistral Ubuntu 24.04 LTS 18.0.1-0ubuntu1.1
  • mistral Ubuntu 25.10 21.0.0-0ubuntu1.1
  • mistral Ubuntu 26.04 LTS 22.0.0-0ubuntu1.1

ubuntu advisories UBUNTU-CVE-2026-41283

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41283 updated cvss 9.9

openstack-mistral: OpenStack Mistral: Arbitrary Remote Code Execution via exposed API endpoints

  • Red Hat OpenStack Platform 16.2 python3-mistral, openstack-mistral-all, openstack-mistral-api, openstack-mistral-common, openstack-mistral-engine, openstack-mistral-executor, +2 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADP 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
GitHub 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi mistral
>=20.0.0, <20.1.1
1 listed version
2 listed versions
20.1.1

Affected products

  • OpenStack Mistral
  • Red Hat Red Hat OpenStack Platform 16.2

Classification

Weakness
  • CWE-863 Incorrect Authorization
  • CWE-749 Exposed Dangerous Method or Function

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.