EUVD-2026-65966
GHSA-54xv-jgg9-3m6v
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
AV:N for web-delivered crafted page, AC:H for required prior renderer compromise, UI:R for victim page visit, S:C for sandbox escape yielding full host-level C/I/A impact.
Primary rating from Vendor (Chrome).
CVSS VectorVendor: Chrome
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
Improper input validation in Chromecast in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
AnalysisAI
Sandbox escape via Chromecast in Google Chrome prior to 152.0.7977.65 allows a remote attacker who has already achieved renderer process compromise to execute arbitrary code outside Chrome's sandbox through a crafted HTML page. Rated Critical by the Chromium security team, the flaw is a chained exploit requiring a prior renderer compromise plus user interaction, reflected in AC:H and UI:R CVSS metrics. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two sequential conditions: first, the attacker must have independently compromised the Chrome renderer process through a separate vulnerability - this is the primary constraint captured by AC:H in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H correctly captures the dual-stage nature of this attack: a prior renderer process compromise is required (driving AC:H), and the victim must visit a crafted page (UI:R). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker first exploits a separate Chrome renderer vulnerability (e.g., a V8 type confusion or Blink memory corruption flaw) to achieve code execution within the sandboxed renderer process, then serves a crafted HTML page that triggers the Chromecast improper input validation bug, causing the renderer to break out of Chrome's sandbox and execute attacker-controlled code at the host OS privilege level. No public exploit code has been identified at time of analysis, and the two-stage attack chain substantially raises the bar for exploitation. |
| Remediation | Update Google Chrome to version 152.0.7977.65 or later via the stable channel update detailed 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, audit all systems to identify Chrome versions prior to 152.0.7977.65 and communicate patch urgency to end users and system administrators. …
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Same weakness CWE-20 – Improper Input Validation
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External POC / Exploit Code
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