🛡️ CVE-2026-43802 — macos

🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-787 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-43802 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2026-43802 is recorded against 1 package.

  • macos (from 26.0 up to 26.6)

Timeline and source

Published on 27 July 2026 and last revised on 28 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

support.apple.com
support.apple.com
support.apple.com

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-787
Public Exploit ✅ No
Source NVD
Published 2026-07-27
Updated 2026-08-11
Modified 2026-07-28
Fix URL N/A

Affected Packages

Software From version Fixed in
macos 26.0 26.6

References

Release Notes, Vendor Advisory https://support.apple.com/en-us/128067
Release Notes, Vendor Advisory https://support.apple.com/en-us/128071
Release Notes, Vendor Advisory https://support.apple.com/en-us/128072

Similar Threats

Exploit Protection

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