CVE-2026-39872 Apple CVE debrief

Who should care

Users of Apple products, particularly those who browse the web on their devices, should apply the available updates to prevent potential crashes caused by malicious web content. This includes users of Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Additionally, IT administrators and security teams responsible for managing Apple devices should prioritize applying the updates to prevent potential service disruptions.

Technical summary

The vulnerability, addressed in various Apple products, involves improper memory handling. This could allow an attacker to craft malicious web content that, when processed, leads to an unexpected process crash. The issue has been fixed in the latest versions of the affected products. The vulnerability is related to the processing of web content and could potentially be used to cause denial-of-service conditions. Users should ensure that all Apple products are updated to the latest versions to prevent potential crashes.

Defensive priority

Medium priority should be given to applying the patches, as the vulnerability could potentially be used to cause denial-of-service conditions.

Recommended defensive actions

• Apply the available security updates for Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS.
• Ensure that all Apple products are updated to the latest versions.
• Be cautious when browsing the web on Apple devices, especially on untrusted sites.
• 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 2026-06-29T20:17:34.040Z and was last modified on 2026-07-27T21:16:51.180Z. The NVD entry is currently Modified. This issue is addressed in various Apple products, including 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. The vulnerability involves improper memory handling, which could allow an attacker to craft malicious web content that, when processed, leads to an unexpected process crash. Users should verify the updates are applied and monitor for potential crashes caused by malicious web content.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.