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PatchSiren cyber security CVE debrief

CVE-2026-43700 Apple CVE debrief

CVE-2026-43700 is a cross-origin issue affecting various Apple products, including Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The issue was addressed with improved tracking of security origins. This vulnerability has a CVSS score of 6.5 and can lead to disclosure of sensitive user information if exploited. Users of affected Apple products should apply available updates to prevent potential disclosure of sensitive user information. The vulnerability is considered to be of medium priority.

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 affected Apple products, including Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, should apply the available updates to prevent potential disclosure of sensitive user information. This includes administrators and users of these products in enterprise, government, and consumer environments. Security teams and vulnerability management teams should prioritize patching and review the CVE record and NVD entry for additional context.

Technical summary

A cross-origin issue was addressed with improved tracking of security origins. This 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, watchOS 26.6. Processing maliciously crafted web content may disclose sensitive user information. The vulnerability exists due to improper handling of security origins, allowing attackers to potentially access sensitive user data.

Defensive priority

Medium priority, as the vulnerability has a CVSS score of 6.5 and can lead to disclosure of sensitive user information.

Recommended defensive actions

  • Apply the available updates for Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS.
  • Ensure that all affected Apple products are updated to the latest versions.
  • Monitor web content for potential malicious activity.
  • 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 2026-06-29T20:17:35.080Z and was last modified on 2026-07-27T21:16:53.620Z. The NVD entry is currently Modified. This issue affects various Apple products, including Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Users should verify the availability of updates for these products and apply them as necessary. The CVE record and NVD entry provide additional context, but may not reflect the full scope of affected systems or potential impacts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-43700 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-43700

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

  • CVE-2026-43700 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43700

    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.