1. Home
  2. CVE Database
  3. CVE-2026-20620
HIGH · 7.7

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 unexpecte...

Vulnerability Description

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 memory.

CVSS Score

7.7

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
AppleMacos>= 14.0, < 14.8.4

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2026-20620?

CVE-2026-20620 is a vulnerability with a CVSS score of 7.7 (HIGH). 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 unexpecte...

How severe is CVE-2026-20620?

CVE-2026-20620 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20620?

Check the references section above for vendor advisories and patch information. Affected products include: Apple Macos.