How severe is CVE-2026-12466?

CVE-2026-12466 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-2026-12466 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-12466?

CVE-2026-12466 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-12466?

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-2026-12466 have an EU (EUVD) identifier?

Yes. CVE-2026-12466 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37551.

When was CVE-2026-12466 published?

CVE-2026-12466 was published on 2026-06-17 and last updated on 2026-06-18.

CVE-2026-12466

CVE-2026-12466 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% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37551
Weakness: CWE-122
Affected product: Google Chrome
Published: 2026-06-17
Last modified: 2026-06-18

Description

Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)

Frequently asked questions

What is CVE-2026-12466?: Heap buffer overflow in WebRTC in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)
How severe is CVE-2026-12466?: CVE-2026-12466 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-2026-12466 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-12466?: CVE-2026-12466 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-12466?: 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-2026-12466 have an EU (EUVD) identifier?: Yes. CVE-2026-12466 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37551.
When was CVE-2026-12466 published?: CVE-2026-12466 was published on 2026-06-17 and last updated on 2026-06-18.

References

Affected products (1)

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

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