What is CVE-2026-65391?

CVE-2026-65391 is a high-severity vulnerability in Apple iOS And Ipados, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-09-14.

How severe is CVE-2026-65391?

High severity. CVSS v3 base score is 8.8 out of 10.

Integer overflow in Apple iOS And Ipados

CVE-2026-65391

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in Safari 26.6.1, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Apple Ios And Ipados
Apple Macos
Apple Safari
Apple Tvos
Apple Visionos
Apple Watchos

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

product-security@apple.com
product-security@apple.com
product-security@apple.com
product-security@apple.com
product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-65391?: CVE-2026-65391 is a high-severity vulnerability in Apple iOS And Ipados, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-09-14.
How severe is CVE-2026-65391?: High severity. CVSS v3 base score is 8.8 out of 10.