CVE-2025-43457

webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash

View on CVE.org
Published Nov 4, 2025 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.

Analysis

AI-generated

Technical impact

A use‑after‑free bug in WebKitGTK was identified in Safari and related Apple browsers. The flaw arises from insufficient memory cleanup after removal of a memory reference, causing a crash when the browser processes specially crafted web content. The primary outcome is a denial‑of‑service because the targeted browser terminates unexpectedly, disrupting user sessions and potentially leading to broader availability issues for services dependent on the browser.

Affected Systems

Affected vendors include Apple with the Safari web browser and the operating systems Apple iOS, iPadOS, macOS, visionOS, and watchOS. The vulnerability is fixed in Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, and watchOS 26.1. Earlier releases before these versions remain susceptible.

Risk and Exploitability

The CVSS rating of 6.5 labels the bug as moderately severe, and an EPSS score of less than 1% indicates a very low exploitation probability. It is not listed in the CISA KEV catalog. The attack is most likely carried out remotely via malicious web content delivered over the network, making it exploitable by any compromised or malicious website visited by a user running one of the affected Apple platforms.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade all Apple devices to Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, and watchOS 26.1 or later to eliminate the vulnerability.
  • As an interim measure, restrict access to potentially malicious sites or enable browser security features such as content blockers until the patch is installed.
  • Continually check Apple’s security advisories and WebKitGTK release notes for additional updates that address this issue or related memory‑management problems.

Generated by OpenCVE AI on April 28, 2026 at 10:27 UTC.

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4528-1 webkit2gtk security update
Debian DSA Debian DSA DSA-6172-1 webkit2gtk security update
Ubuntu USN Ubuntu USN USN-8237-1 WebKitGTK vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

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

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}
Type Values Removed Values Added
Description A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash. A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Type Values Removed Values Added
Title webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
References
Metrics threat_severity

None

 threat_severity

Important
Type Values Removed Values Added
Description A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash. A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.
References
Type Values Removed Values Added
First Time appeared Apple iphone Os
CPEs cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
Vendors & Products Apple iphone Os
Type Values Removed Values Added
First Time appeared Apple
Apple ios
Apple ipados
Apple safari
Apple visionos
Apple watchos
Vendors & Products Apple
Apple ios
Apple ipados
Apple safari
Apple visionos
Apple watchos
Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
Description A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.
References
Earlier changes (3)
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Jul 15, 2026, 1:26 AM
Reserved
Apr 16, 2025, 3:24 PM

View source JSON

Updated
Jun 30, 2026, 12:07 PM

JSON

Status
Modified
Published
Nov 4, 2025, 2:15 AM
Modified
Oct 18, 2026, 9:10 PM

View source JSON

Severity
Important
Public date
Mar 18, 2026, 12:00 AM

View source Bugzilla JSON

Updated
Apr 28, 2026, 10:30 AM

JSON