CVE-2026-5301: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in coolercontrol-ui

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-08 · updated 2026-10-23
Weakness: CWE-79

Description

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

coolercontrold: before 4.0.0 — fixed in 4.0.0

How to fix

Upgrade to a fixed version: coolercontrold 4.0.0. Check the vendor advisory for mitigations.

References

https://gitlab.com/coolercontrol/coolercontrol/-/blob/2.0.0/coolercontrol-ui/src/views/AppInfoView.vue?ref_type=tags#L224
https://gitlab.com/coolercontrol/coolercontrol/-/blob/3.1.1/coolercontrol-ui/src/views/AppInfoView.vue?ref_type=tags#L350
https://gitlab.com/coolercontrol/coolercontrol/-/releases/4.0.0

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