What is CVE-2026-5301?

CVE-2026-5301 is a high-severity vulnerability in Coolercontrol Coolercontrold, 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 Coolercontrold

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)

Published 2026-04-08 · last modified 2026-07-24.

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.

EPSS exploit prediction

EPSS: 0.004 (27.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Coolercontrol Coolercontrold
Coolercontrol Coolercontrol-Ui — versions 2.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-5301?: CVE-2026-5301 is a high-severity vulnerability in Coolercontrol Coolercontrold, 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.