CVE-2026-86900 Information disclosure in macOS

What is CVE-2026-86900?

CVE-2026-86900 is a medium-severity 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

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27. Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure.

Weakness: CWE-125

Which versions are affected by CVE-2026-86900?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-86900?

No fix has been published for CVE-2026-86900 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-86900 being exploited?

There is no known exploitation of CVE-2026-86900 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-wpxh-v4gv-wjh5.