CVE-2026-20643

Summary

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.

Affected Software

VendorProductVersion RangeStatus
AppleSafari0 < 26.4affected
AppleiOS and iPadOS0 < 18.7.7affected
AppleiOS and iPadOS0 < 26.3.1 (a)affected
AppleiOS and iPadOS0 < 26.4affected
ApplemacOS0 < 26.3.1 (a)affected
ApplemacOS0 < 26.3.2 (a)affected
ApplemacOS0 < 26.4affected
ApplevisionOS0 < 26.4affected

Weaknesses

  • Processing maliciously crafted web content may bypass Same Origin Policy

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References