EUVD-2026-40212
GHSA-xxx6-g6jv-xq96
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Network-reachable via web content with no privileges; UI:R because a page visit is required; C:H for process memory disclosure; no integrity or availability impact.
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
5DescriptionCVE.org
The issue was addressed with improved memory handling. 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 result in the disclosure of process memory.
AnalysisAI
Safari, iOS/iPadOS, and macOS Tahoe expose process memory when the browser engine processes maliciously crafted web content, rooted in a CWE-119 improper memory buffer restriction (tagged Buffer Overflow). The CVSS vector (AV:N/AC:L/PR:N/UI:R/C:H) indicates a network-reachable, low-complexity attack requiring only that the victim visit or render attacker-controlled content, resulting in high confidentiality impact through memory leakage. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target user navigate to or render attacker-controlled web content using an unpatched version of Safari, iOS/iPadOS (before 26.5.2), or macOS Tahoe (before 26.5.2). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 Medium score is driven by UI:R (user interaction required) and S:U (no scope change), which cap the base score despite PR:N and C:H. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious webpage embedding specially formed HTML, CSS, or JavaScript content designed to trigger the CWE-119 buffer boundary violation in WebKit's content processing pipeline. When an unpatched Safari or iOS/iPadOS user visits the page - via a phishing link, malicious advertisement, or compromised legitimate site embedding an iframe - the browser engine processes the content and leaks regions of its own process memory back to the attacker, potentially exposing session cookies, authentication tokens, or sensitive page data. … |
| Remediation | The primary fix is to upgrade to the patched versions released by Apple: Safari 26.5.2, iOS 26.5.2 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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Same weakness CWE-119 – Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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