EUVD-2026-40192
GHSA-qxph-q4j6-rfqr
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Web content is network-delivered (AV:N), low complexity, no auth (PR:N) but needs the victim to open the page (UI:R); the sandbox escape changes scope (S:C) with limited low impact across C/I/A.
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Lifecycle Timeline
5DescriptionCVE.org
The issue was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may be able to process restricted web content outside the sandbox.
AnalysisAI
Sandbox escape in Apple's WebKit browser engine (Safari, iOS/iPadOS, and macOS Tahoe before 26.5.2) lets a malicious website process restricted web content outside the browser sandbox, undermining the isolation that confines untrusted web pages. The flaw stems from improper input validation (CWE-20), was reported by Apple itself, and requires a victim to visit attacker-controlled content (UI:R); CVSS 7.1 reflects limited confidentiality, integrity, and availability impact across a changed scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively visit or load an attacker-controlled malicious website in an unpatched Safari/WebKit browser (UI:R); there is no authentication requirement (PR:N) and no special victim-side configuration beyond running a version below 26.5.2 of Safari, iOS/iPadOS, or macOS. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are moderate and internally consistent. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a malicious web page and lures a victim into opening it via a phishing link, malvertising, or a compromised site. When the unpatched Safari/WebKit renderer parses the crafted content, improper input validation lets the page process restricted web content outside the sandbox, exposing data or resources that should be isolated from the untrusted page. … |
| Remediation | Vendor-released patch: update to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2, which Apple states fixes the issue via improved input validation; apply via Settings/Software Update or the App Store per Apple advisories 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
24 hours: Inventory macOS Tahoe, iOS, and iPadOS devices; block non-updated Safari usage on critical systems if possible. …
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External POC / Exploit Code
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