CVE-2026-50589: In OpenStack Ironic 32 before 37.0.0, an unauthenticated malicious user could submit a crafted JSON string to

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-50589 is a medium-severity flaw (CVSS 5.3) affecting ironic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-770, CWE-502
Published	2026-06-05
Last modified	2026-07-23

Publisher (CNA): MITRE · Vendor: openstack

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 00:17 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

openstack ironic UPGRADE

Affected: >= 32.0.0 and < 37.0.0

Fixed in: 37.0.0

Safe to downgrade to: a release before 32.0.0

1. Check installed version

apt-cache policy ironic || rpm -q ironic || ironic --version

2. UPGRADE to 37.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ironic

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ironic

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 32.0.0 (Debian / Ubuntu)

apt-cache madison ironic sudo apt install ironic=<VERSION_BEFORE_32.0.0> sudo apt-mark hold ironic

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ironic sudo dnf downgrade ironic-<VERSION_BEFORE_32.0.0> sudo dnf versionlock add ironic

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-50589?

ironic: upgrade to 37.0.0. Exact commands for each OS are on this page.

Is CVE-2026-50589 being exploited?

CVE-2026-50589 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-50589 affect?

CVE-2026-50589 affects ironic. Severity is medium (CVSS 5.3). 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.

How urgent is CVE-2026-50589?

Priority 33/100. Remotely exploitable, no login, no user action

Software pages

OpenStack vulnerabilities

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References

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