CVE-2026-43815 Memory corruption in macOS

What is CVE-2026-43815?

CVE-2026-43815 is a high-severity memory corruption vulnerability in Apple Macos, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A buffer overflow 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. Connecting to a malicious afpfs server may lead to kernel memory corruption.

Weakness: CWE-787

Which versions are affected by CVE-2026-43815?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-43815?

No fix has been published for CVE-2026-43815 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-43815 being exploited?

There is no known exploitation of CVE-2026-43815 in the wild and no public exploit code.

Other vulnerabilities in Apple Macos

• CVE-2026-65400 Apple macOS Improper Authentication Exploited Critical 9.8
• CVE-2024-44146 Security feature bypass in macOS Critical 10.0
• CVE-2024-44148 Security feature bypass in macOS Critical 10.0
• CVE-2023-38586 Security feature bypass in macOS Critical 10.0
• CVE-2023-40455 Security feature bypass in macOS Critical 10.0

All Apple Macos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-85ff-jrm6-jh74.