CVE-2025-43480: A malicious website may exfiltrate data cross-origin in Apple Safari
CVE-2025-43480 is a high-severity vulnerability in Apple Safari that allows a malicious website to exfiltrate data across origins. The issue involves insufficient cross-origin data access checks, which could lead to unauthorized data leakage. Apple addressed this vulnerability with improved checks and fixed it in Safari 26.1 and corresponding OS versions including iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1.
AI Analysis
Technical Summary
This vulnerability (CVE-2025-43480) in Apple Safari is due to inadequate enforcement of cross-origin data access policies, allowing a malicious website to exfiltrate data from other origins. The flaw was mitigated by Apple through improved validation checks. The fix was released in Safari 26.1 and related OS versions. The CVSS v3.1 base score is 8.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality and integrity but no impact on availability.
Potential Impact
Successful exploitation could allow an attacker controlling a malicious website to steal sensitive data from other origins within the browser context, compromising confidentiality and integrity of user data. There is no indication of availability impact. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Apple has released an official fix for this vulnerability in Safari 26.1 and corresponding OS updates (iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1). Users and administrators should update to these versions to remediate the issue. Patch status is confirmed by the vendor advisory.
CVE-2025-43480: A malicious website may exfiltrate data cross-origin in Apple Safari
Description
CVE-2025-43480 is a high-severity vulnerability in Apple Safari that allows a malicious website to exfiltrate data across origins. The issue involves insufficient cross-origin data access checks, which could lead to unauthorized data leakage. Apple addressed this vulnerability with improved checks and fixed it in Safari 26.1 and corresponding OS versions including iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1.
CVSS v3.1
Score 8.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-43480) in Apple Safari is due to inadequate enforcement of cross-origin data access policies, allowing a malicious website to exfiltrate data from other origins. The flaw was mitigated by Apple through improved validation checks. The fix was released in Safari 26.1 and related OS versions. The CVSS v3.1 base score is 8.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality and integrity but no impact on availability.
Potential Impact
Successful exploitation could allow an attacker controlling a malicious website to steal sensitive data from other origins within the browser context, compromising confidentiality and integrity of user data. There is no indication of availability impact. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Apple has released an official fix for this vulnerability in Safari 26.1 and corresponding OS updates (iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1). Users and administrators should update to these versions to remediate the issue. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2025-04-16T15:24:37.126Z
- State
- PUBLISHED
Threat ID: 69095bb378d4f574c2a8f4a3
Added to database: 11/04/2025, 01:49:39 UTC
Last enriched: 08/12/2026, 15:41:06 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 151
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