How severe is CVE-2018-6066?

CVE-2018-6066 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-6066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6066?

CVE-2018-6066 primarily affects Google Chrome. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-6066?

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

When was CVE-2018-6066 published?

CVE-2018-6066 was published on 2018-11-14 and last updated on 2026-06-17.

CVE-2018-6066

CVE-2018-6066 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 6.5. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Google Chrome
Published: 2018-11-14
Last modified: 2026-06-17

Description

Lack of CORS checking by ResourceFetcher/ResourceLoader in Blink in Google Chrome prior to 65.0.3325.146 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Frequently asked questions

What is CVE-2018-6066?: Lack of CORS checking by ResourceFetcher/ResourceLoader in Blink in Google Chrome prior to 65.0.3325.146 allowed a remote attacker to leak cross-origin data via a crafted HTML page.
How severe is CVE-2018-6066?: CVE-2018-6066 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-6066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6066?: CVE-2018-6066 primarily affects Google Chrome. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-6066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6066 published?: CVE-2018-6066 was published on 2018-11-14 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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