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Apple Safari CVE-2026-43715

| EUVDEUVD-2026-40183 HIGH
Use After Free (CWE-416)
2026-06-29 apple GHSA-rvhg-xh7h-fp5g
Buffer Overflow Use After Free Memory Corruption Apple Ios And Ipados
8.8
CVSS 3.1 · Vendor: apple
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Severity by source

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

Remote crafted web content (AV:N/AC:L/PR:N) requires the user to load the page (UI:R); a WebKit renderer UAF plausibly yields high C/I/A within the unchanged scope.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 29, 2026 - 22:31 vuln.today
CVSS changed
Jun 29, 2026 - 22:22 NVD
8.8 (HIGH)
Patch available
Jun 29, 2026 - 22:02 EUVD
CVE Published
Jun 29, 2026 - 19:42 cve.org
UNKNOWN (no severity yet)
CVE Published
Jun 29, 2026 - 19:42 cve.org
HIGH 8.8

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 memory corruption.

AnalysisAI

Memory corruption in Apple's WebKit browser engine (Safari and the system WebView on iOS, iPadOS, and macOS before 26.5.2) allows a remote attacker to corrupt process memory when a victim loads maliciously crafted web content. The flaw is a use-after-free (CWE-416) and carries a CVSS 8.8 with required user interaction; there is no public exploit identified at time of analysis and it is not listed in CISA KEV, though Apple reported and patched it in coordinated releases on 2026 advisories.

Technical ContextAI

The vulnerability resides in Apple's WebKit rendering engine, which underpins Safari and any application using the system WebView (WKWebView) on iOS, iPadOS, and macOS. The root cause is a use-after-free (CWE-416): an object is freed while a dangling reference remains reachable, and subsequent access to that stale pointer during processing of crafted HTML/JavaScript/DOM content leads to memory corruption. The CPE set (cpe:2.3:a:apple:safari, cpe:2.3:a:apple:ios_and_ipados, cpe:2.3:a:apple:macos) confirms the bug spans the browser application and the OS-bundled web stack, meaning the attack surface is any code path that renders untrusted web content. Apple addressed it with improved memory management, the standard remediation for lifecycle/ownership defects in the engine.

RemediationAI

Vendor-released patch: update to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2, which contain the corrected memory management; this is the primary and recommended fix. Consult Apple's advisories at https://support.apple.com/en-us/127594, https://support.apple.com/en-us/127595, and https://support.apple.com/en-us/127685 for exact build numbers and device coverage. Because exploitation requires rendering malicious web content, an interim compensating control is to restrict browsing to trusted sites and deploy web/DNS filtering or a secure web gateway to block untrusted or unknown domains until devices are updated - the trade-off is reduced browsing flexibility and incomplete coverage against newly registered malicious domains. Disabling JavaScript in Safari would substantially reduce the attack surface for DOM/JS-driven UAF triggers but breaks the majority of modern websites and is generally impractical fleet-wide. There is no reliable workaround that preserves full functionality, so prompt patching is the correct course.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected

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CVE-2026-43715 vulnerability details – vuln.today
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