How severe is CVE-2026-3063?

CVE-2026-3063 has a CVSS 3.x base score of 5.4, 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 none.

Is CVE-2026-3063 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3063?

CVE-2026-3063 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3063?

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

Does CVE-2026-3063 have an EU (EUVD) identifier?

Yes. CVE-2026-3063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7471.

When was CVE-2026-3063 published?

CVE-2026-3063 was published on 2026-02-23 and last updated on 2026-06-17.

CVE-2026-3063

CVE-2026-3063 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7471
Affected product: Google Chrome
Published: 2026-02-23
Last modified: 2026-06-17

Description

Inappropriate implementation in DevTools in Google Chrome prior to 145.0.7632.116 allowed an attacker who convinced a user to install a malicious extension to inject scripts or HTML into a privileged page via DevTools. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-3063?: Inappropriate implementation in DevTools in Google Chrome prior to 145.0.7632.116 allowed an attacker who convinced a user to install a malicious extension to inject scripts or HTML into a privileged page via DevTools. (Chromium security severity: High)
How severe is CVE-2026-3063?: CVE-2026-3063 has a CVSS 3.x base score of 5.4, 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 none.
Is CVE-2026-3063 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3063?: CVE-2026-3063 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3063?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3063 have an EU (EUVD) identifier?: Yes. CVE-2026-3063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7471.
When was CVE-2026-3063 published?: CVE-2026-3063 was published on 2026-02-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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