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PatchSiren cyber security CVE debrief

CVE-2026-43745 Apple CVE debrief

Apple has addressed an out-of-bounds write issue in Safari, which could lead to an unexpected browser crash when processing maliciously crafted web content. The issue is fixed 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. This vulnerability has a CVSS score of 6.5 and a severity of MEDIUM.

Vendor
Apple
Product
Safari
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-29
Original CVE updated
2026-08-17
Advisory published
2026-06-29
Advisory updated
2026-08-17

Who should care

Users of Apple devices who browse the web using Safari should apply the available updates to ensure their browsers are secure. This includes users of iPhones, iPads, Macs, Apple TVs, and Apple Watches. IT teams and security professionals responsible for managing and securing Apple devices should prioritize applying these updates.

Technical summary

The CVE-2026-43745 vulnerability is an out-of-bounds write issue in Apple Safari. This issue could allow an attacker to cause an unexpected Safari crash by providing maliciously crafted web content. The vulnerability has been addressed with improved input validation in the latest Safari and operating system updates. Users should apply the available security updates to ensure their browsers are secure.

Defensive priority

Medium

Recommended defensive actions

  • Apply the available security updates for Safari and the respective operating systems.
  • Ensure that all Apple devices are updated to the latest versions of their operating systems.
  • Be cautious when visiting unfamiliar websites or clicking on links from unknown sources.
  • 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 2026-06-29T20:17:37.880Z and was last modified on 2026-07-27T21:16:59.193Z. The NVD entry is currently Modified. This issue is related to an out-of-bounds write issue addressed with improved input validation 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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-43745 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-43745

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-43745 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43745

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.