CVE-2026-50589 — ironic
MEDIUMCVE-2026-50589 is a medium-severity (CVSS 5.3) CWE-770 vulnerability in ironic. A fix is available for ironic — see the affected versions and patch details below.
OpenStack Ironic: Crafted JSON String to Certain Endpoints on the API or JSON-RPC Service May Result in Service Crash
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-50589.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
ironicReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
In OpenStack Ironic 32 before 37.0.0, an unauthenticated malicious user could submit a crafted JSON string to some endpoints on the API or JSON-RPC service and effect a service crash.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | ironic | ≥ 32.0.0&&< 37.0.0 | 37.0.0pip install --upgrade 'ironic==37.0.0' |
Affected Products
ironicopenstackDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ironic, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update ironic to 37.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-50589 is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
To reduce the risk of exploitation, restrict network access to the OpenStack Ironic API and JSON-RPC service endpoints. Configure firewall rules to permit connections only from trusted hosts and networks that require access to Ironic services. This operational control limits the attack surface by preventing unauthenticated remote attackers from reaching the vulnerable endpoints. A restart of the Ironic services may be required for firewall changes to take full effect, which could temporarily impact bare metal provisioning operations.Source: Red Hat security advisory for CVE-2026-50589 (CC BY 4.0)
Frequently Asked Questions
Is CVE-2026-50589 in your dependencies?
Find it across PyPI, including transitive dependencies.