EUVD-2026-40183
GHSA-rvhg-xh7h-fp5g
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.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.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to load attacker-controlled web content in an unpatched WebKit instance (Safari or any app using the system WebView) on iOS/iPadOS/macOS before 26.5.2 - i.e., user interaction is mandatory (UI:R): the user must navigate to a malicious page or open content that auto-renders crafted HTML/JavaScript. … 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:H/I:H/A:H, score 8.8) describes a network-reachable, low-complexity, unauthenticated bug whose only gating factor is user interaction - the victim must visit or be lured to a malicious page. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a malicious web page containing crafted content that triggers the use-after-free in WebKit and lures a target into visiting it via a phishing link, malicious ad, or compromised site. When the victim's unpatched Safari or WebView renders the page, the dangling pointer is dereferenced and process memory is corrupted, potentially giving the attacker control over the renderer. … |
| 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 corrected memory management; this is the primary and recommended fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all macOS, iOS, and iPadOS devices in scope. …
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Same weakness CWE-416 – Use After Free
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External POC / Exploit Code
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