Vulnerability · Published May 11, 2026 · Assigned by apple
CVE-2026-28819
Medium 5.4
In plain English
A medium-severity out-of-bounds write in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 6.5% (higher than 94% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)6.5%top 6.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to execute arbitrary code with kernel privileges.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS | 0 – before 18.7.9 |
| Apple | macOS | 0 – before 14.8.70 – before 15.7.70 – before 26.5 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N