VDB
CVE-2026-43803
CVE-2026-43803
PUBLISHED
CVSS 9.8 CRITICAL
Reported by apple · Published July 27, 2026
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. A remote attacker may be able to cause unexpected system termination.
Risk Scores
CVSS 3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS | 0 |
| Apple | macOS | 0, 0, 0 |
| Apple | tvOS | 0 |
| Apple | visionOS | 0 |
| Apple | watchOS | 0 |
| Apple | macOS | 0, 0, 0 |
| Apple | tvOS | 0, 0 |
| Apple | iOS and iPadOS | 0, 0 |
| Apple | visionOS | 0, 0 |
| Apple | watchOS | 0, 0 |
Timeline
- Jul 27, 2026 CVE Published
- Jul 28, 2026 Coalition ESS Score
- Jul 28, 2026 Security Advisory
- Jul 28, 2026 CVE Updated