What is CVE-2026-8520?

CVE-2026-8520 is a high-severity vulnerability in Apple Macos, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.3/10. Published 2026-05-14.

How severe is CVE-2026-8520?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Apple Macos

CVE-2026-8520

Race in Payments in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

Vulnerability class: Race Condition

EPSS: 0.001 (20.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

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

Frequently asked questions

What is CVE-2026-8520?: CVE-2026-8520 is a high-severity vulnerability in Apple Macos, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.3/10. Published 2026-05-14.
How severe is CVE-2026-8520?: High severity. CVSS v3 base score is 8.3 out of 10.