Is CVE-2026-5301 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5301 being exploited in the wild.

How severe is CVE-2026-5301?

High severity, with a CVSS score of 7.6, published 8 April 2026.

Which products and versions are affected?

CoolerControl UI >= 2.0.0, < 4.0.0.

Is there a fix for CVE-2026-5301?

A patch was published on 2026-04-08: Fixed in version 4.0.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-5301 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-5301?

Check whether you run CoolerControl UI or Coolercontrold at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-5301: CoolerControl coolercontrol-ui stored XSS in log viewer

Q: Is there a fix for CVE-2026-5301?

A patch was published on 2026-04-08: Fixed in version 4.0.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-5301 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-5301?

Check whether you run CoolerControl UI or Coolercontrold at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-5301 · Severity: high · CVSS 7.6 · Published 2026-04-08

CoolerControl is a cooling and monitoring utility for Linux systems. A security vulnerability in its user interface allows unauthenticated attackers to inject malicious code into the system's logs. If an administrator views these logs, the attacker can take control of the service, potentially leading to unauthorized system changes or data access.

Technologies: Coolercontrold. Vendors: Coolercontrol.

Quick answers

Is CVE-2026-5301 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5301 being exploited in the wild.
How severe is CVE-2026-5301?: High severity, with a CVSS score of 7.6, published 8 April 2026.
Which products and versions are affected?: CoolerControl UI >= 2.0.0, < 4.0.0.
Is there a fix for CVE-2026-5301?: A patch was published on 2026-04-08: Fixed in version 4.0.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-5301 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-5301?: Check whether you run CoolerControl UI or Coolercontrold at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stored Cross-Site Scripting (XSS) vulnerability exists in the log viewer component of coolercontrol-ui (specifically within AppInfoView.vue). The application fails to properly neutralize input before displaying log entries to the user. An unauthenticated attacker can exploit this by generating malicious log entries containing JavaScript. When a user with administrative privileges views these logs, the script executes in their browser context, allowing the attacker to perform actions on behalf of the user or take over the service. This issue is resolved in version 4.0.0.

Affected products

CoolerControl coolercontrol-ui >= 2.0.0, < 4.0.0

Timeline

2026-04-08: disclosed
2026-04-08: advisory
2026-04-08: patched: Fixed in version 4.0.0

References

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