What is CVE-2026-4444?

CVE-2026-4444 is a high-severity vulnerability in Apple macOS, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-20.

How severe is CVE-2026-4444?

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

Is CVE-2026-4444 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apple macOS

CVE-2026-4444

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

Vulnerability class: Buffer Overflow

EPSS: 0.003 (22.4th 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

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

Public proof-of-concept exploits

George0Papasotiriou/CVE-2026-4444-JWT-Algorithm-Confusion-via-kid-Injection

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-4444?: CVE-2026-4444 is a high-severity vulnerability in Apple macOS, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-20.
How severe is CVE-2026-4444?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-4444 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.