CVE-2026-65390 Apple Safari - Integer Overflow

Apple Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS contain an integer overflow caused by insufficient input validation when processing web content, letting attackers cause memory corruption, exploit requires malicious web content.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.41% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Integer Overflow
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-190

Vendor fix

Update to Safari 26.6.1, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27 or latest available versions

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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