What is CVE-2026-86903?

CVE-2026-86903 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-09-14.

How severe is CVE-2026-86903?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Out-of-bounds Read in Apple iOS And Ipados

CVE-2026-86903

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. An app may be able to disclose kernel memory.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

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

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

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-2026-86903?: CVE-2026-86903 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-09-14.
How severe is CVE-2026-86903?: Medium severity. CVSS v3 base score is 5.5 out of 10.