Security Digest · Vulnerability record
CVE-2026-41283: OpenStack Mistral allows Arbitrary Remote Code Execution when the API is exposed
OpenStack Mistral through 22.0.0 allows Arbitrary Remote Code Execution when the API is exposed.
CVSS 9.9 Critical EPSS 0.9% · p60
Should you act?
Critical, preconditions apply
Severe if exploited, but exploitation needs conditions that may not apply to you. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
From the GitHub advisory
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.
Weakness type: CWE-863, CWE-749.
Product: mistral (PyPI) · Assigned by: mitre · Published: 2026-06-04
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | mistral | >= 20.0.0, < 20.1.1 | 20.1.1 |
| PyPI | mistral | = 21.0.0 | none listed |
| PyPI | mistral | = 22.0.0 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| OpenStack | Mistral | 20.0.0 < 20.1.1, 21.0.0, 22.0.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| mitre | 3.1 | 9.9 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| redhat-SADP | 3.1 | 9.9 Critical | 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 |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by mitre
- — GitHub-reviewed advisory GHSA-9hfw-w3f4-c4p8 published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-9hfw-w3f4-c4p8 github.com
- CVE.org record CVE-2026-41283 cve.org
- NVD entry CVE-2026-41283 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
- openwall.com openwall.com
- security.openstack.org security.openstack.org
- openwall.com openwall.com
- access.redhat.com access.redhat.com
- RHBZ#2484607 bugzilla.redhat.com
- security.access.redhat.com security.access.redhat.com