What is CVE-2026-5301?

CVE-2026-5301 is a high-severity vulnerability in Coolercontrol Coolercontrol-ui, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-04-08.

How severe is CVE-2026-5301?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Coolercontrol Coolercontrol-ui

CVE-2026-5301

Stored XSS in log viewer in CoolerControl/coolercontrol-ui <4.0.0 allows unauthenticated attackers to take over the service via malicious JavaScript in poisoned log entries

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (12.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L.

Affected products

Coolercontrol Coolercontrol-ui — versions 2.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/coolercontrol/coolercontrol/-/blob/2.0.0/coolercontrol-ui/src/views/…
gitlab.com/coolercontrol/coolercontrol/-/blob/3.1.1/coolercontrol-ui/src/views/…
gitlab.com/coolercontrol/coolercontrol/-/releases/4.0.0

Frequently asked questions

What is CVE-2026-5301?: CVE-2026-5301 is a high-severity vulnerability in Coolercontrol Coolercontrol-ui, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-04-08.
How severe is CVE-2026-5301?: High severity. CVSS v3 base score is 7.6 out of 10.