CVE-2026-43735

Safari and iOS Browsers Allow Cross‑Origin Data Exfiltration via Same‑Origin Policy Bypass

Published Jun 29, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. A malicious website may exfiltrate data cross-origin.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title Safari and iOS Browsers Allow Cross‑Origin Data Exfiltration via Same‑Origin Policy Bypass
Type Values Removed Values Added
Description The issue was addressed with improved checks. 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. A malicious website may exfiltrate data cross-origin. The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. A malicious website may exfiltrate data cross-origin.
References
Type Values Removed Values Added
Title Cross‑Origin Data Exfiltration via Improper Same‑Origin Checks in Apple WebKit
Type Values Removed Values Added
Title Cross‑Origin Data Exfiltration via Improper Same‑Origin Checks in Apple WebKit
Weaknesses CWE-1021
CWE-79
Type Values Removed Values Added
Description The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may exfiltrate data cross-origin. The issue was addressed with improved checks. 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. A malicious website may exfiltrate data cross-origin.
References
Type Values Removed Values Added
Title Apple Safari and iOS Cross‑Origin Data Exfiltration Vulnerability
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
Weaknesses CWE-352
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Apple safari
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Apple safari
Type Values Removed Values Added
Title Apple Safari and iOS Cross‑Origin Data Exfiltration Vulnerability
Weaknesses CWE-1021
CWE-79
Type Values Removed Values Added
Description The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may exfiltrate data cross-origin.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Aug 17, 2026, 9:29 PM
Reserved
May 1, 2026, 10:46 PM
Status
Modified
Published
Jun 29, 2026, 8:17 PM
Modified
Aug 17, 2026, 10:17 PM