CVE-2026-5208: Command injection in alerts in CoolerControl/coolercontrold <4.0.0 allows authenticated attackers to execute a

This month

HIGH 8.2UPGRADE

CVE-2026-5208 is a high-severity flaw (CVSS 8.2) affecting coolercontrold. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Command injection in alerts in CoolerControl/coolercontrold <4.0.0 allows authenticated attackers to execute arbitrary code as root via injected bash commands in alert names

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-08
Last modified	2026-10-23

Publisher (CNA): GitLab Inc. · Vendor: coolercontrol

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 12:16 UTCPublished CVE record published
2026-10-23 23:10 UTCUpdated Record last modified

coolercontrol coolercontrold UPGRADE

Affected: >= 3.1.0 and <= 4.0.0

Fixed in: newer than 4.0.0

Safe to downgrade to: a release before 3.1.0

1. Check installed version

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

2. UPGRADE to newer than 4.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade coolercontrold

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 3.1.0 (Debian / Ubuntu)

apt-cache madison coolercontrold sudo apt install coolercontrold=<VERSION_BEFORE_3.1.0> sudo apt-mark hold coolercontrold

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

dnf --showduplicates list coolercontrold sudo dnf downgrade coolercontrold-<VERSION_BEFORE_3.1.0> sudo dnf versionlock add coolercontrold

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.

Exact fixes by distribution

Fedora 46 · python-trimesh · FIXED · 5.2.0-1.fc46 · FEDORA-2026-429b4bad4c · source

sudo dnf upgrade --advisory=FEDORA-2026-429b4bad4c

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-2026-5208?

coolercontrold: upgrade to newer than 4.0.0. Exact commands for each OS are on this page.

Is CVE-2026-5208 being exploited?

CVE-2026-5208 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-2026-5208 affect?

CVE-2026-5208 affects coolercontrold. Severity is high (CVSS 8.2). Command injection in alerts in CoolerControl/coolercontrold <4.0.0 allows authenticated attackers to execute arbitrary code as root via injected bash commands in alert names

How urgent is CVE-2026-5208?

Priority 47/100. High severity

Related CVEs

CVE-2026-5302 MEDIUM 6.3 UPGRADE CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read d
CVE-2026-5301 HIGH 7.6 UPGRADE Stored XSS in log viewer in CoolerControl/coolercontrol-ui <4.0.0 allows unauthenticated attackers to take ove
CVE-2026-5300 MEDIUM 5.9 UPGRADE Unauthenticated functionality in CoolerControl/coolercontrold <4.0.0 allows unauthenticated attackers to view

References

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