What is CVE-2026-5300?

CVE-2026-5300 is a medium-severity vulnerability in Coolercontrol Coolercontrold, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-04-08.

How severe is CVE-2026-5300?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Coolercontrol Coolercontrold

CVE-2026-5300

Unauthenticated functionality in CoolerControl/coolercontrold <4.0.0 allows unauthenticated attackers to view and modify potentially sensitive data via HTTP requests

Vulnerability class: Broken Authentication

EPSS: 0.000 (6.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Coolercontrol Coolercontrold — versions 0.14.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

gitlab.com/coolercontrol/coolercontrol/-/blob/3.1.1/coolercontrold/src/api/rout…
gitlab.com/coolercontrol/coolercontrol/-/releases/4.0.0

Frequently asked questions

What is CVE-2026-5300?: CVE-2026-5300 is a medium-severity vulnerability in Coolercontrol Coolercontrold, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-04-08.
How severe is CVE-2026-5300?: Medium severity. CVSS v3 base score is 5.9 out of 10.