What is CVE-2026-28848?

CVE-2026-28848 is a high-severity vulnerability in Apple macOS, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-05-11.

How severe is CVE-2026-28848?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Apple macOS

CVE-2026-28848

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.7, macOS Tahoe 26.5. A remote attacker may be able to cause unexpected system termination.

Vulnerability class: Buffer Overflow

Published 2026-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000

Affected products

Apple macOS — versions 0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

support.apple.com/en-us/127115 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127116 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28848?: CVE-2026-28848 is a high-severity vulnerability in Apple macOS, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-05-11.
How severe is CVE-2026-28848?: High severity. CVSS v3 base score is 7.5 out of 10.