How severe is CVE-2026-5302?

CVE-2026-5302 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5302 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5302?

CVE-2026-5302 affects Coolercontrol Coolercontrold. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5302?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5302 have an EU (EUVD) identifier?

Yes. CVE-2026-5302 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20461.

When was CVE-2026-5302 published?

CVE-2026-5302 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-5302

CVE-2026-5302 is a medium-severity vulnerability in Coolercontrol Coolercontrold with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-942.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20461
Weakness: CWE-942
Affected product: Coolercontrol Coolercontrold
Published: 2026-04-08
Last modified: 2026-06-17

Description

CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites

Frequently asked questions

What is CVE-2026-5302?: CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites
How severe is CVE-2026-5302?: CVE-2026-5302 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5302 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5302?: CVE-2026-5302 affects Coolercontrol Coolercontrold. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5302?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5302 have an EU (EUVD) identifier?: Yes. CVE-2026-5302 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20461.
When was CVE-2026-5302 published?: CVE-2026-5302 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:coolercontrol:coolercontrold:*:*:*:*:*:*:*:*

More vulnerabilities in Coolercontrol Coolercontrold

CVE-2026-5208 — High (CVSS 8.2): Command injection in alerts in CoolerControl/coolercontrold <4.0.0 allows authenticated attackers to execute arbitrary…
CVE-2026-5301 — High (CVSS 7.6): Stored XSS in log viewer in CoolerControl/coolercontrol-ui <4.0.0 allows unauthenticated attackers to take over the…
CVE-2026-5300 — Medium (CVSS 5.9): Unauthenticated functionality in CoolerControl/coolercontrold <4.0.0 allows unauthenticated attackers to view and…

All CVEs affecting Coolercontrol Coolercontrold →

Other CWE-942 vulnerabilities

CVE-2022-26969 — Critical (CVSS 9.8): In Directus before 9.7.0, the default settings of CORS_ORIGIN and CORS_ENABLED are true.
CVE-2022-31736 — Critical (CVSS 9.8): A malicious website could have learned the size of a cross-origin resource that supported Range requests. This…
CVE-2026-34449 — Critical (CVSS 9.6): SiYuan is a personal knowledge management system. Prior to version 3.6.2, a malicious website can achieve Remote Code…
CVE-2026-30924 — Critical (CVSS 9.6): qui is a web interface for managing qBittorrent instances. Versions 1.14.1 and below use a permissive CORS policy that…
CVE-2026-9739 — Critical (CVSS 9.4): Vulnerable to DNS rebinding attacks when using SSE (http://b/499408790). During the beta phase, we implemented…
CVE-2026-8948 — Critical (CVSS 9.1): Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird…

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