EUVD-2026-65970
GHSA-hhcc-xj56-gmqc
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Remote crafted-page attack needs no auth (PR:N) but requires the victim to open it (UI:R); sandbox escape changes scope (S:C) with total impact (C/I/A:H).
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
Use of uninitialized variable in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
AnalysisAI
Sandbox-escaping remote code execution in Google Chrome for iOS (versions prior to 152.0.7977.65) stems from use of an uninitialized variable that a remote attacker can trigger with a crafted HTML page, potentially running arbitrary code outside the renderer sandbox. Rated Critical by Chromium with a CVSS 9.6 (scope-changed) vector, it requires the victim to visit a malicious page but no authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open attacker-controlled content: the CVE specifies a 'crafted HTML page' processed by Chrome's Mobile component on iOS, and the CVSS vector's UI:R confirms required user interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals conflict between severity and imminence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts or injects a crafted HTML page and lures an iOS Chrome user (via phishing link, malvertising, or a compromised site) to open it. Rendering the page triggers the uninitialized-variable condition, and the attacker chains it to break out of the browser sandbox and run code on the device. … |
| Remediation | Vendor-released patch: 152.0.7977.65 - update Google Chrome on iOS to 152.0.7977.65 or later via the Apple App Store, and verify auto-update is enabled so the fix propagates fleet-wide; reference the Chrome Releases advisory at https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, send notification to iOS users and confirm Google's automatic app store rollout of Chrome version 152.0.7977.65 or later is active; if your organization manages Chrome via MDM, verify the patch deployment is queued. …
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Same weakness CWE-457 – Use of Uninitialized Variable
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External POC / Exploit Code
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