Description

Incorrect authorization in Sandbox 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: High)

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.3",
  "pubDate": "2026-08-25T21:18:15.867Z",
  "pubdate": "2026-08-25T21:18:15.867Z",
  "executiveSummary": "A critical security vulnerability involving incorrect authorization within the Google Chrome Sandbox has been identified, allowing for potential sandbox escapes.\nThe flaw resides in the architectural implementation of the sandbox, specifically impacting Google Chrome versions prior to 152.0.7977.65.\nThis vulnerability is classified with High severity, as it facilitates a remote attacker who has already achieved code execution within the compromised renderer process to break out of the restricted sandbox environment.\nBy leveraging a crafted HTML page, an attacker can escalate privileges to execute arbitrary code on the underlying host system, bypassing the security boundaries designed to isolate web content.\nThe risk implication is severe, as successful exploitation results in full host system compromise, negating the primary security guarantees provided by the Chrome multi-process architecture.\nExploitation requires the attacker to first successfully exploit a renderer-level vulnerability to gain initial execution, followed by the deployment of a specific payload designed to trigger the sandbox authorization flaw.",
  "technicalDetails": "The vulnerability is rooted in an incorrect authorization logic flaw within the Sandbox component of the Chromium-based browser engine. The Chromium sandbox relies on the principle of least privilege, isolating the renderer process—which handles untrusted web content—from the system resources and the OS kernel.\nUnder normal operations, the renderer process operates with highly restricted system calls and limited file system access. The vulnerability arises because the authorization checks governing the interface between the renderer process and the higher-privileged browser process or system-level services are insufficient.\nAn attacker who has successfully compromised the renderer process via a prior exploit (such as a memory corruption vulnerability in the V8 JavaScript engine or the Blink rendering engine) can leverage this sandbox escape to move laterally from the restricted process to the host environment.\nThe attack flow initiates when a remote attacker induces a victim to navigate to a specifically crafted HTML page. This page contains the payload necessary to exercise the logic flaw within the sandbox’s inter-process communication (IPC) or system call filtering mechanism.\nBy sending a sequence of malicious IPC messages or triggering an edge case in the sandbox policy enforcement, the attacker exploits the flawed authorization logic. Because the sandbox incorrectly validates the authorization credentials or the origin of the requested action, it permits operations that should be denied.\nUpon successful exploitation, the attacker effectively breaks the containment provided by the sandbox, gaining the ability to execute arbitrary code outside the renderer process's context. This grants the attacker the execution privileges of the browser process or potentially the user account running the browser, depending on the specific system configuration.\nThe vulnerability is present in all Google Chrome versions prior to 152.0.7977.65. It represents a fundamental breakdown in the security boundary between the untrusted web content execution environment and the host operating system, effectively rendering the sandbox security controls ineffective against a sophisticated, multi-stage attack chain."
}