What is CVE-2026-13778?

CVE-2026-13778 is a high-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 7.8/10. Published 2026-06-30.

How severe is CVE-2026-13778?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Apple macOS

CVE-2026-13778

Use after free in WebUSB in Google Chrome on Mac prior to 150.0.7871.47 allowed a local attacker to execute arbitrary code via a malicious peripheral. (Chromium security severity: Critical)

Vulnerability class: Use-After-Free

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Apple macOS
Google Chrome — versions 150.0.7871.47

Weakness classification (CWE)

CWE-416 — Use After Free

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352… (Vendor Advisory)
issues.chromium.org/issues/513167952 (Permissions Required)

Frequently asked questions

What is CVE-2026-13778?: CVE-2026-13778 is a high-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 7.8/10. Published 2026-06-30.
How severe is CVE-2026-13778?: High severity. CVSS v3 base score is 7.8 out of 10.