What is CVE-2026-6296?

CVE-2026-6296 is a critical-severity vulnerability in Apple macOS, classified under Heap-based Buffer Overflow. CVSS score: 9.6/10. Published 2026-04-15.

How severe is CVE-2026-6296?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Buffer overflow in Apple macOS

CVE-2026-6296

Heap buffer overflow in ANGLE in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

Vulnerability class: Buffer Overflow

Published 2026-04-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.html (Release Notes, Vendor Advisory)
issues.chromium.org/issues/490170083 (Permissions Required)

Frequently asked questions

What is CVE-2026-6296?: CVE-2026-6296 is a critical-severity vulnerability in Apple macOS, classified under Heap-based Buffer Overflow. CVSS score: 9.6/10. Published 2026-04-15.
How severe is CVE-2026-6296?: Critical severity. CVSS v3 base score is 9.6 out of 10.