PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-43708 Apple CVE debrief

A malicious website may exfiltrate data cross-origin due to an input validation issue addressed 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. This issue has a CVSS score of 4.3 and is considered Medium severity. The vulnerability allows a malicious website to potentially exfiltrate data cross-origin.

Vendor
Apple
Product
Safari
CVSS
MEDIUM 4.3
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 update to the latest versions to mitigate the issue. This includes administrators and users of these products in various environments, such as enterprise, education, and personal use.

Technical summary

The CVE-2026-43708 issue was 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. A malicious website may exfiltrate data cross-origin due to this vulnerability. This issue affects multiple Apple products. The vulnerability is related to input validation and can be exploited by a malicious website, potentially leading to data exfiltration. Users of affected Apple products should update to the latest versions to mitigate the issue. The CVSS score of 4.3 indicates a Medium severity vulnerability.

Defensive priority

Medium priority due to the CVSS score of 4.3 and the potential for data exfiltration. Defenders should prioritize updating affected products and monitoring for potential exploitation attempts.

Recommended defensive actions

  • Update Safari to version 26.5.2 or later
  • Update iOS to version 26.5.2 or later
  • Update iPadOS to version 26.5.2 or later
  • Update macOS to version 26.5.2 or later
  • Update tvOS to version 26.6 or later
  • Update visionOS to version 26.6 or later
  • Update watchOS to version 26.6 or later

Evidence notes

The CVE record was published on 2026-06-29T20:17:35.783Z and was last modified on 2026-07-27T21:16:54.707Z. The NVD entry is currently Modified. This issue affects multiple Apple products, including Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Users should verify their product versions and update to the latest versions if necessary.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-43708 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-43708

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

  • CVE-2026-43708 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43708

    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.