What is CVE-2026-7978?

CVE-2026-7978 is a high-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 8.1/10. Published 2026-05-06.

How severe is CVE-2026-7978?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Apple Macos

CVE-2026-7978

Inappropriate implementation in Companion in Google Chrome on Mac prior to 148.0.7778.96 allowed a remote attacker to perform OS-level privilege escalation via malicious network traffic. (Chromium security severity: Medium)

EPSS: 0.001 (30.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Macos
Google Chrome — versions 148.0.7778.96

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

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

Frequently asked questions

What is CVE-2026-7978?: CVE-2026-7978 is a high-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 8.1/10. Published 2026-05-06.
How severe is CVE-2026-7978?: High severity. CVSS v3 base score is 8.1 out of 10.