CVE-2021-32756: ManageIQ is an open-source management platform

This month

HIGH 8.8DOWNGRADE

CVE-2021-32756 is a high-severity flaw (CVSS 8.8) affecting manageiq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ManageIQ is an open-source management platform. In versions prior to jansa-4, kasparov-2, and lasker-1, there is a flaw in the MiqExpression module of ManageIQ where a low privilege user could enter a crafted Ruby string which would be evaluated. Successful exploitation will allow an attacker to execute arbitrary code with root privileges on the host system. There are patches for this issue in releases named jansa-4, kasparov-2, and lasker-1. If

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-74, CWE-94
Published	2021-07-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: manageiq

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-21 19:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

manageiq manageiq DOWNGRADE

Affected: jansa-1 · jansa-1 alpha1 · jansa-1 beta1 · jansa-1 rc1 · jansa-1 rc2 · jansa-2 · jansa-3 · kasparov-1

Fixed in: no fixed release known

Safe to downgrade to: a release before jansa-1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before jansa-1 (Debian / Ubuntu)

apt-cache madison manageiq sudo apt install manageiq=<VERSION_BEFORE_jansa-1> sudo apt-mark hold manageiq

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list manageiq sudo dnf downgrade manageiq-<VERSION_BEFORE_jansa-1> sudo dnf versionlock add manageiq

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-2021-32756?

manageiq: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-32756 being exploited?

CVE-2021-32756 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-2021-32756 affect?

CVE-2021-32756 affects manageiq. Severity is high (CVSS 8.8). ManageIQ is an open-source management platform. In versions prior to jansa-4, kasparov-2, and lasker-1, there is a flaw in the MiqExpression module of ManageIQ where a low privilege user could enter a crafted Ruby string which would be eval

How urgent is CVE-2021-32756?

Priority 50/100. High severity

Software pages

Ruby vulnerabilities

References

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