CVE-2026-43699 Apple CVE debrief

Who should care

Users of Apple Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS should apply the updates to prevent potential crashes from processing maliciously crafted web content. This includes operators, security teams, and vulnerability management teams responsible for maintaining these systems.

Technical summary

The CVE-2026-43699 vulnerability is a use-after-free issue in Apple Safari that can lead to an unexpected process crash when processing maliciously crafted web content. This issue was addressed with improved memory management in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Affected users should apply the updates to prevent potential crashes.

Defensive priority

Medium priority due to the potential for crashes and the availability of patches. Users should prioritize applying the updates to prevent potential crashes.

Recommended defensive actions

• Apply Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6 updates
• Restrict access to untrusted web content
• Monitor for unusual browser crashes
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-06-29T20:17:34.970Z and was last modified on 2026-07-27T21:16:53.463Z. The NVD entry is currently Modified. This use-after-free issue affects Apple Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Defenders should verify affected product deployments and apply updates or mitigations accordingly.

Official resources