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

Q: Is CVE-2026-5301 being exploited?

There is no known exploitation of CVE-2026-5301 in the wild and no public exploit code.

Q: How do I fix CVE-2026-5301?

No fix has been published for CVE-2026-5301 yet. Limit exposure of the affected software until one is available.

High 7.6 Published 8 Apr 2026 Updated 8 Apr 2026

Unauthenticated attackers can execute malicious JavaScript via poisoned log entries in the CoolerControl UI, potentially taking over the service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-5301?

CVE-2026-5301 is a high-severity cross-site scripting vulnerability in coolercontrol-ui, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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

Weakness: CWE-79

Which versions are affected by CVE-2026-5301?

It affects 1 product.

Products include Coolercontrol Coolercontrold.

How do I fix CVE-2026-5301?

No fix has been published for CVE-2026-5301 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-5301 being exploited?

There is no known exploitation of CVE-2026-5301 in the wild and no public exploit code.

Sources

Also known as GHSA-6vr8-827j-mg8v.