What is CVE-2026-7339?

CVE-2026-7339 is a high-severity vulnerability in Apple Macos, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-04-28.

How severe is CVE-2026-7339?

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

Buffer overflow in Apple Macos

CVE-2026-7339

Heap buffer overflow in WebRTC in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

Vulnerability class: Buffer Overflow

EPSS: 0.000 (13.9th percentile) — read the EPSS interpretation.

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.

Affected products

Apple Macos
Google Chrome — versions 147.0.7727.138
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

chrome-cve-admin@google.com (Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-7339?: CVE-2026-7339 is a high-severity vulnerability in Apple Macos, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-04-28.
How severe is CVE-2026-7339?: High severity. CVSS v3 base score is 8.8 out of 10.