EUVD-2026-40210
GHSA-h545-qxq5-vpjg
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Web content delivery is network-based with no auth needed; user must visit the page (UI:R); crash-only impact means A:H with C:N and I:N, scope unchanged.
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
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 lead to an unexpected process crash.
AnalysisAI
Memory corruption in Apple's WebKit-based web content processing allows an unauthenticated remote attacker to crash the affected process by luring a user to visit a maliciously crafted webpage. Affected platforms include Safari, iOS, iPadOS, and macOS Tahoe, all prior to version 26.5.2. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim actively visit or be redirected to a maliciously crafted webpage - confirmed by the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) accurately characterizes a moderate-severity denial-of-service: network-reachable, no privileges needed, low complexity, but requiring active user interaction (visiting a malicious page). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker publishes a webpage containing maliciously crafted HTML, CSS, or JavaScript designed to trigger the WebKit buffer overflow. When a victim on an unpatched Apple device browses to this page using Safari (or any iOS/iPadOS browser, which all use WebKit), the content parser encounters the malformed input, corrupts memory, and causes the browser process to crash. … |
| Remediation | Vendor-released patch: Safari 26.5.2, iOS 26.5.2 / iPadOS 26.5.2, and macOS Tahoe 26.5.2. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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