How severe is CVE-2026-4463?

CVE-2026-4463 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-2026-4463 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4463?

CVE-2026-4463 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4463?

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.

Does CVE-2026-4463 have an EU (EUVD) identifier?

Yes. CVE-2026-4463 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13480.

When was CVE-2026-4463 published?

CVE-2026-4463 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-4463

CVE-2026-4463 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-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13480
Weakness: CWE-122
Affected product: Google Chrome
Published: 2026-03-20
Last modified: 2026-06-17

Description

Heap buffer overflow in WebRTC in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-4463?: Heap buffer overflow in WebRTC in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-4463?: CVE-2026-4463 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-2026-4463 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4463?: CVE-2026-4463 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4463?: 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.
Does CVE-2026-4463 have an EU (EUVD) identifier?: Yes. CVE-2026-4463 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13480.
When was CVE-2026-4463 published?: CVE-2026-4463 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

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

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