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Apple Safari EUVDEUVD-2026-40207

| CVE-2026-43746 MEDIUM
Use After Free (CWE-416)
2026-06-29 apple GHSA-q973-f466-5gv5
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

Web content delivery is network-based (AV:N), no privileges needed (PR:N), but user must load the page (UI:R); impact is crash only, 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: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 - 22:39 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 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 processing causes an unexpected application crash across Apple platforms. Affected are Safari, iOS, iPadOS, and macOS Tahoe prior to version 26.5.2; exploitation requires only that a user visits or loads maliciously crafted web content, making drive-by delivery via a malicious webpage the primary vector. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Host maliciously crafted web page
Delivery
Deliver link via phishing or malvertising
Exploit
User opens page in Safari
Execution
Use-after-free triggered in web content parser
Persist
Safari process crashes
Impact
Denial of service achieved
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Vulnerability AssessmentAI

Exploitation The sole exploitation condition is that the target user processes maliciously crafted web content in Safari - in practice, visiting an attacker-controlled or attacker-injected webpage. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H yields a score of 6.5 (Medium), reflecting a low-complexity, unauthenticated network attack that nonetheless requires user interaction and produces only a DoS outcome. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers or compromises a website and embeds maliciously crafted web content designed to trigger the use-after-free condition in Safari's rendering engine. A victim user on an unpatched Apple device navigates to the page - via a phishing link, malicious advertisement, or QR code redirect - causing Safari to process the crafted content and crash. …
Remediation Vendor-released patch: Safari 26.5.2, iOS and iPadOS 26.5.2, and macOS Tahoe 26.5.2. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-40207 vulnerability details – vuln.today
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