CVE-2026-86929

An out-of-bounds write issue was addressed with improved bounds checking

Risk score: 58/100
CVSS: 8.8 v3.1
Published: 26 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 8.8 high
Remotely exploitable without logging in

References

https://support.apple.com/en-us/149035
https://support.apple.com/en-us/149522
https://support.apple.com/en-us/149523

Original description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.

Last activity 26 Oct 2026. Patch Forecast updates every hour.