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How the CVE Works:
CVE-2026-11676 is a high-severity vulnerability residing in the Dawn graphics engine, Google’s implementation of the WebGPU standard. The core issue is “Insufficient validation of untrusted input” (CWE-20), which allows specially crafted data to bypass expected safety checks.
The attack chain requires two stages. First, the attacker must already have compromised the browser’s renderer process—the sandboxed environment where web content is processed and executed. This initial compromise could be achieved via a separate, renderer-level vulnerability like a use-after-free or type confusion.
Once the renderer is under the attacker’s control, they can interact directly with the Dawn API. A malicious actor would then craft a specific HTML page containing a sequence of WebGPU calls and data. Due to the lack of proper input validation, this crafted page tricks the Dawn engine into performing an operation that violates the security boundaries of the sandbox.
This violation can allow the attacker to escape the restrictive renderer process. Consequently, they could execute arbitrary code on the underlying operating system with the full privileges of the user running the Chrome browser. While the CVSS base scores vary, with VulDB rating it 6.3 (Medium) and others noting a high impact, the Chromium project has assigned it a “High” security severity due to its potential for complete system compromise. Versions of Chrome for Linux and ChromeOS prior to `149.0.7827.103` are vulnerable. No public exploit code is currently available, but the technical details are sufficient to make developing one feasible, leading to a predicted patch release based on the fixed version.
DailyCVE Form:
Platform: Linux, ChromeOS
Version: < 149.0.7827.103
Vulnerability : Sandbox Escape
Severity: High (Chromium)
date: 2026-06-08
Prediction: 2026-06-11
What Undercode Say:
The exploitability hinges on the initial renderer compromise. Attackers would need to weaponize the Dawn engine’s input validation flaw as a sandbox escape primitive.
Exploit:
No public exploit exists. A Proof-of-Concept (PoC) would involve a compromised renderer process invoking the Dawn API with malformed buffer data or shader code to corrupt memory outside the sandbox.
Protection:
Update Google Chrome to version `149.0.7827.103` or later immediately.
Impact:
Successful exploitation allows an attacker to break out of Chrome’s security sandbox and execute arbitrary code with the user’s system-level privileges.
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Sources:
Reported By: nvd.nist.gov
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