PatchTheCVECVE-2026-28819: An out-of-bounds write issue was addressed with improved bounds checking
CVE-2026-28819 is a medium-severity flaw (CVSS 5.4) affecting ipados, iphone os, macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- EPSS top 6%: very likely to be exploited
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 6.5% (top 6%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2026-05-11 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-28819?
ipados: upgrade to 18.7.9; iphone os: upgrade to 18.7.9; macos: upgrade to 14.8.7, 15.7.7, 26.5. Exact commands for each OS are on this page.
Is CVE-2026-28819 being exploited?
CVE-2026-28819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-28819 affect?
CVE-2026-28819 affects ipados, iphone os, macos. Severity is medium (CVSS 5.4). 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 ke
How urgent is CVE-2026-28819?
Priority 42/100. EPSS top 6%: very likely to be exploited
Software pages
iOS vulnerabilities · macOS vulnerabilities · iPadOS vulnerabilities
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