How severe is CVE-2026-11063?

CVE-2026-11063 has a CVSS 3.x base score of 9.6, rated critical 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-2026-11063 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-11063?

CVE-2026-11063 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-11063?

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

Does CVE-2026-11063 have an EU (EUVD) identifier?

Yes. CVE-2026-11063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34511.

When was CVE-2026-11063 published?

CVE-2026-11063 was published on 2026-06-04 and last updated on 2026-06-17.

CVE-2026-11063

CVE-2026-11063 is a critical-severity vulnerability in Google Chrome with a CVSS 3.x base score of 9.6. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34511
Weakness: CWE-20
Affected product: Google Chrome
Published: 2026-06-04
Last modified: 2026-06-17

Description

Insufficient validation of untrusted input in WebNN in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

Frequently asked questions

What is CVE-2026-11063?: Insufficient validation of untrusted input in WebNN in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
How severe is CVE-2026-11063?: CVE-2026-11063 has a CVSS 3.x base score of 9.6, rated critical 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-2026-11063 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-11063?: CVE-2026-11063 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-11063?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-11063 have an EU (EUVD) identifier?: Yes. CVE-2026-11063 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34511.
When was CVE-2026-11063 published?: CVE-2026-11063 was published on 2026-06-04 and last updated on 2026-06-17.

References

Affected products (1)

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

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