Auth bypass in OpenStack Mistral

CVE-2026-41283

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.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-41283: held from 0.007 to 0.009.

EPSS over last 30 days · oldest: 0.007 · newest: 0.009 · change: +0.002

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-41283?
CVE-2026-41283 is a critical-severity vulnerability in OpenStack Mistral, classified under Incorrect Authorization. CVSS score: 9.9/10. Published 2026-06-04.
How severe is CVE-2026-41283?
Critical severity. CVSS v3 base score is 9.9 out of 10.