What is CVE-2026-11158?

CVE-2026-11158 is a high-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2026-06-04.

How severe is CVE-2026-11158?

High severity. CVSS v3 base score is 8.6 out of 10.

Improper input validation in Apple macOS

CVE-2026-11158

Insufficient validation of untrusted input in Downloads in Google Chrome on Mac prior to 149.0.7827.53 allowed a local attacker to potentially perform a sandbox escape via a crafted AppleScript command. (Chromium security severity: Medium)

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-06-04 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.2% 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 149.0.7827.53

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html (Vendor Advisory)
issues.chromium.org/issues/501844153 (Permissions Required)

Frequently asked questions

What is CVE-2026-11158?: CVE-2026-11158 is a high-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2026-06-04.
How severe is CVE-2026-11158?: High severity. CVSS v3 base score is 8.6 out of 10.