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Apple Safari EUVDEUVD-2026-40213

| CVE-2026-43717 MEDIUM
Use After Free (CWE-416)
2026-06-29 apple GHSA-686m-qmpj-pqxf
Memory Corruption Apple Denial Of Service Use After Free Ios And Ipados
6.5
CVSS 3.1 · Vendor: apple
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Severity by source

Vendor (apple) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

AV:N/AC:L/PR:N because visiting a webpage is the only requirement; UI:R for mandatory victim interaction; A:H for confirmed crash with C:N/I:N as no data exfiltration or tampering is described.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 29, 2026 - 22:40 vuln.today
CVSS changed
Jun 29, 2026 - 22:22 NVD
6.5 (MEDIUM)
Patch available
Jun 29, 2026 - 22:02 EUVD
CVE Published
Jun 29, 2026 - 19:43 cve.org
MEDIUM 6.5
CVE Published
Jun 29, 2026 - 19:43 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.

AnalysisAI

Use-after-free memory corruption in Safari's web content rendering engine causes an unexpected application crash when processing maliciously crafted web content. Affected are Apple Safari, iOS and iPadOS, and macOS Tahoe - all prior to version 26.5.2. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker crafts malicious web page
Delivery
Victim lured to page via phishing or malvertising
Exploit
Safari loads and parses crafted content
Execution
Use-after-free triggered in WebKit renderer
Impact
Safari process crashes unexpectedly
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Vulnerability AssessmentAI

Exploitation No special server-side configuration or non-default product setting is required: the vulnerability is triggered by the act of processing (rendering/visiting) maliciously crafted web content in Safari. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 Medium score reflects a real but bounded threat: AV:N/AC:L/PR:N makes this trivially reachable over the internet with no attacker-side privileges or configuration required, but UI:R (victim must visit a page) introduces a meaningful social engineering barrier. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a webpage containing malicious HTML, JavaScript, or media content designed to trigger the use-after-free condition in WebKit's memory management. A victim is directed to this page via phishing, malvertising, or a compromised site and opens it in Safari on macOS, iPhone, or iPad - causing the Safari process to crash unexpectedly. …
Remediation Vendor-released patches are available: update to Safari 26.5.2, iOS and iPadOS 26.5.2, and macOS Tahoe 26.5.2 as appropriate for the platform. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-40213 vulnerability details – vuln.today
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