What is CVE-2026-8569?

CVE-2026-8569 is a high-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 8.3/10. Published 2026-05-14.

How severe is CVE-2026-8569?

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

Buffer overflow in Apple macOS

CVE-2026-8569

Out of bounds write in Codecs in Google Chrome on Mac prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file. (Chromium security severity: Medium)

Vulnerability class: Buffer Overflow

Published 2026-05-14 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.003 (16.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.1% 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: 0.003 · change: +0.000

Affected products

Apple macOS
Google Chrome — versions 148.0.7778.168

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html (Vendor Advisory)
issues.chromium.org/issues/490229299 (Permissions Required)

Frequently asked questions

What is CVE-2026-8569?: CVE-2026-8569 is a high-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 8.3/10. Published 2026-05-14.
How severe is CVE-2026-8569?: High severity. CVSS v3 base score is 8.3 out of 10.