What is CVE-2026-11305?

CVE-2026-11305 is a high-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 8.8/10. Published 2026-06-05.

How severe is CVE-2026-11305?

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

Use After Free in Apple macOS

CVE-2026-11305

Use after free in PDFium in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: Low)

Vulnerability class: Use-After-Free

Published 2026-06-05 · last modified 2026-07-23.

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.

EPSS exploit prediction

EPSS: 0.002 (12.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html (Release Notes)
issues.chromium.org/issues/504545544 (Permissions Required)

Frequently asked questions

What is CVE-2026-11305?: CVE-2026-11305 is a high-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 8.8/10. Published 2026-06-05.
How severe is CVE-2026-11305?: High severity. CVSS v3 base score is 8.8 out of 10.