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Apple iOS/iPadOS EUVDEUVD-2026-40208

| CVE-2026-43706 MEDIUM
Double Free (CWE-415)
2026-06-29 apple GHSA-g38x-fqx6-c9wx
Apple Denial Of Service 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

Web content delivery is network-based requiring no privileges; user must visit the page (UI:R); only a process crash results, so C:N/I:N and A:H.

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:P/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 - 22:39 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 double free issue was addressed with improved memory management. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.

AnalysisAI

Double free memory corruption in Apple's web content processing engine crashes the rendering process on iOS/iPadOS (pre-26.5.2) and macOS Tahoe (pre-26.5.2) when a device processes attacker-controlled web content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) confirms network delivery with no authentication required, though a user must interact with the malicious content, and impact is limited to availability - no confidentiality or integrity compromise is indicated. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker hosts crafted web page
Delivery
Victim navigates to malicious URL
Exploit
WebKit parses crafted content
Execution
Double free triggered in memory allocator
Impact
WebContent process crashes unexpectedly
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Vulnerability AssessmentAI

Exploitation The victim must actively process maliciously crafted web content - for example, by navigating to an attacker-controlled URL in Safari or any app using WebKit for rendering. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 medium score reflects a realistic but bounded threat: network-reachable (AV:N), low complexity (AC:L), no privileges needed (PR:N), but user interaction is required (UI:R), and scope is unchanged (S:U) with no confidentiality or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker hosts a maliciously crafted webpage containing content designed to trigger the double free in Apple's web content processing engine. A victim on an unpatched iOS, iPadOS, or macOS device visits the page (or is redirected to it via phishing), causing the WebContent process to crash unexpectedly and the browser or app to terminate. …
Remediation Update to iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2 immediately via Settings > General > Software Update (iOS/iPadOS) or System Settings > General > Software Update (macOS). … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-40208 vulnerability details – vuln.today
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