CVE-2026-28860

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-11 · updated 2026-10-26
Weakness: CWE-20

Description

The issue was addressed with improved input validation. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A local attacker may be able to modify the state of the Keychain.

Affected products

Apple iPadOS: before 18.7.7; from 26.0 before 26.4 — fixed in 18.7.7, 26.4
Apple Iphone Os: before 18.7.7; from 26.0 before 26.4 — fixed in 18.7.7, 26.4
Apple macOS: from 14.0 before 14.8.5; from 15.0 before 15.7.5; from 26.0 before 26.4 — fixed in 14.8.5, 15.7.5, 26.4
Apple tvOS: before 26.4 — fixed in 26.4
Apple visionOS: before 26.4 — fixed in 26.4
Apple watchOS: before 26.4 — fixed in 26.4
Apple iOS and iPadOS: before 18.7.7; before 26.4 — fixed in 18.7.7, 26.4
Apple macOS: before 14.8.5; before 15.7.5; before 26.4 — fixed in 14.8.5, 15.7.5, 26.4
Apple tvOS: before 26.4 — fixed in 26.4
Apple visionOS: before 26.4 — fixed in 26.4
Apple watchOS: before 26.4 — fixed in 26.4

How to fix

Upgrade to a fixed version: Apple iPadOS 18.7.7, 26.4; Apple Iphone Os 18.7.7, 26.4; Apple macOS 14.8.5, 15.7.5, 26.4; Apple tvOS 26.4; Apple visionOS 26.4; Apple watchOS 26.4; Apple iOS and iPadOS 18.7.7, 26.4; Apple macOS 14.8.5, 15.7.5, 26.4; Apple tvOS 26.4; Apple visionOS 26.4; Apple watchOS 26.4. Check the vendor advisory for mitigations.

References

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