CVE-2026-43740: Processing maliciously crafted web content may result in the disclosure of process memory in Apple Safari
The issue was addressed with improved memory handling. 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 result in the disclosure of process memory.
AI Analysis
Technical Summary
CVE-2026-43740 is a memory disclosure vulnerability in Apple Safari caused by improper memory handling when processing maliciously crafted web content. The flaw could allow an attacker to disclose process memory, potentially exposing sensitive information. The issue is fixed in Safari 26.5.2 and related OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). The vulnerability is associated with CWE-416 (Use After Free) and CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer).
Potential Impact
Successful exploitation may lead to disclosure of process memory, which can expose sensitive data to an attacker. The vulnerability does not affect integrity or availability, only confidentiality. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Apply the official fix by updating Safari to version 26.5.2 or later, and update the corresponding Apple operating systems to the specified versions. This vulnerability is addressed by improved memory handling in these updates. No alternative mitigations are indicated.
CVE-2026-43740: Processing maliciously crafted web content may result in the disclosure of process memory in Apple Safari
Description
The issue was addressed with improved memory handling. 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 result in the disclosure of process memory.
CVSS v3.1
Score 6.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43740 is a memory disclosure vulnerability in Apple Safari caused by improper memory handling when processing maliciously crafted web content. The flaw could allow an attacker to disclose process memory, potentially exposing sensitive information. The issue is fixed in Safari 26.5.2 and related OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). The vulnerability is associated with CWE-416 (Use After Free) and CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer).
Potential Impact
Successful exploitation may lead to disclosure of process memory, which can expose sensitive data to an attacker. The vulnerability does not affect integrity or availability, only confidentiality. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Apply the official fix by updating Safari to version 26.5.2 or later, and update the corresponding Apple operating systems to the specified versions. This vulnerability is addressed by improved memory handling in these updates. No alternative mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.647Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d427e9c7971972d162
Added to database: 06/29/2026, 20:21:40 UTC
Last enriched: 07/29/2026, 21:15:19 UTC
Last updated: 08/13/2026, 12:41:10 UTC
Views: 74
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