Out-of-bounds Read in Apple Macos

CVE-2026-20620

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An attacker may be able to cause unexpected system termination or read kernel mem…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-20620?
CVE-2026-20620 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 7.7/10. Published 2026-02-11.
How severe is CVE-2026-20620?
High severity. CVSS v3 base score is 7.7 out of 10.