High severity · published Oct 26, 2026
CVE-2026-86929
An out-of-bounds write issue was addressed with improved bounds checking
New
8.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 15.8.2; before 26.7.2; before 27 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86929
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86929
support.apple.com
https://support.apple.com/en-us/149035
support.apple.com
https://support.apple.com/en-us/149522
support.apple.com
https://support.apple.com/en-us/149523
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