CVE-2026-5302: CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read d

Q: How do I fix CVE-2026-5302?

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

Q: Is CVE-2026-5302 being exploited?

CVE-2026-5302 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5302 affect?

CVE-2026-5302 affects coolercontrold. Severity is medium (CVSS 6.3). CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites

Q: How urgent is CVE-2026-5302?

Priority 35/100. Public exploit reference

Routine

MEDIUM 6.3UPGRADE

CVE-2026-5302 is a medium-severity flaw (CVSS 6.3) affecting coolercontrold. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-942
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 13:16 UTCPublished CVE record published
2026-10-23 22:10 UTCUpdated Record last modified

coolercontrol coolercontrold UPGRADE

Affected: < 4.0.0

Fixed in: 4.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 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.

Exact fixes by distribution

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

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-2026-5302?

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

Is CVE-2026-5302 being exploited?

CVE-2026-5302 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-2026-5302 affect?

CVE-2026-5302 affects coolercontrold. Severity is medium (CVSS 6.3). CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites

How urgent is CVE-2026-5302?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2026-5208 HIGH 8.2 UPGRADE Command injection in alerts in CoolerControl/coolercontrold <4.0.0 allows authenticated attackers to execute a
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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