What is CVE-2026-76034?

CVE-2026-76034 is a high-severity vulnerability in Google Chrome, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-08-18.

How severe is CVE-2026-76034?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Google Chrome

CVE-2026-76034

Buffer overflow in WebGL in Google Chrome prior to 151.0.7922.169 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

Vulnerability class: Buffer Overflow

Published 2026-08-18 · last modified 2026-08-20.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.4th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.006 · change: -0.001

Affected products

Google Chrome

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0826575… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/534923522 (Permissions Required)

Frequently asked questions

What is CVE-2026-76034?: CVE-2026-76034 is a high-severity vulnerability in Google Chrome, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-08-18.
How severe is CVE-2026-76034?: High severity. CVSS v3 base score is 8.8 out of 10.