How severe is CVE-2020-6380?

CVE-2020-6380 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-6380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6380?

CVE-2020-6380 primarily affects Google Chrome. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-6380?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-6380 published?

CVE-2020-6380 was published on 2020-02-11 and last updated on 2026-06-17.

CVE-2020-6380

CVE-2020-6380 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.8. 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-863.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Google Chrome
Published: 2020-02-11
Last modified: 2026-06-17

Description

Insufficient policy enforcement in extensions in Google Chrome prior to 79.0.3945.130 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted Chrome Extension.

Frequently asked questions

What is CVE-2020-6380?: Insufficient policy enforcement in extensions in Google Chrome prior to 79.0.3945.130 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted Chrome Extension.
How severe is CVE-2020-6380?: CVE-2020-6380 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-6380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6380?: CVE-2020-6380 primarily affects Google Chrome. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-6380?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-6380 published?: CVE-2020-6380 was published on 2020-02-11 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

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