CVE-2026-5301: Coolercontrol Coolercontrold

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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

Affected products

• Coolercontrol Coolercontrold: before 4.0.0 (fixed in 4.0.0)

Published 2026-04-08. Last modified 2026-07-24.