EUVD-2026-40206
GHSA-fpv3-789h-j3j4
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Network-delivered web content with low complexity and no privileges, but the victim must load the malicious content (UI:R); impact is a crash, so only A:H.
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
7DescriptionCVE.org
A memory corruption 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
Denial-of-service memory corruption in Apple's WebKit engine affects Safari, iOS/iPadOS, and macOS Tahoe before version 26.5.2, where processing maliciously crafted web content triggers an unexpected process crash. The CVSS vector scores only availability impact (A:H) with no confidentiality or integrity loss, indicating a crash rather than code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to process attacker-controlled web content in WebKit - i.e., open a malicious page in Safari or load it via an embedded WebKit view - so a content-delivery channel (a link, malicious site, malvertising, or compromised page) is the concrete prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are consistent and point to moderate, not critical, real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a malicious web page or serves crafted content through an ad/iframe and lures a victim to open it in Safari or any app rendering web content via WebKit. When the engine parses the content, the buffer-handling flaw corrupts memory and crashes the rendering process, producing a denial of service. … |
| Remediation | 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 improved memory handling fix; this is the primary and recommended action per 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. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all affected Apple devices and browsers in your environment (Safari, iOS, iPadOS, macOS Tahoe prior to version 26.5.2). …
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Same weakness CWE-119 – Buffer Overflow
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External POC / Exploit Code
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