CVE-2026-79182 in Chrome
Summary
by MITRE • 08/26/2026
Improper input validation in Media in Google Chrome 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: Medium)
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an improper input validation flaw within the Media component of Google Chrome prior to version 152.0.7977.65 represents a significant breach in browser security boundaries. This issue stems from insufficient sanitization and type checking mechanisms when processing media-related data structures, allowing malicious actors to manipulate internal state variables or memory layouts through specially crafted HTML content. The core technical flaw lies in the failure of the renderer process to properly validate inputs before passing them to lower-level system calls or native code interfaces responsible for handling multimedia streams. This lack of rigorous validation creates a pathway for attackers to trigger undefined behavior, which can be exploited to achieve arbitrary code execution outside the confines of Chrome's sandbox environment.
From a technical perspective, this vulnerability aligns with CWE-20 Improper Input Validation and potentially CWE-119 Memory Corruption based on the nature of out-of-sandbox execution. The attack vector typically involves an attacker hosting or distributing a malicious webpage containing crafted HTML elements that trigger specific media parsing routines within Chromium's engine. When the browser processes these malformed inputs, it fails to enforce expected constraints such as buffer sizes, data types, or state transitions. This oversight allows for memory corruption techniques like heap overflow or use-after-free scenarios, which are critical prerequisites for bypassing modern sandbox protections. The severity is classified as Medium by the Chromium security team because while exploitation requires user interaction via a crafted page, the potential impact of escaping the sandbox elevates the risk profile significantly compared to standard cross-site scripting issues.
The operational impact of this vulnerability is severe due to its ability to facilitate arbitrary code execution outside the browser's restricted environment. Modern browsers rely heavily on sandboxes to limit the damage caused by successful exploits; if an attacker can execute code in a less privileged or unrestricted context, they gain access to system resources that are normally protected from web-based attacks. This could lead to full device compromise, including data exfiltration, installation of persistent malware, or use of the infected machine as part of a botnet. The ability to escape the sandbox effectively neutralizes many defense-in-depth strategies employed by endpoint security solutions and browser isolation technologies, making this vulnerability particularly dangerous in enterprise environments where Chrome is widely deployed for web-based applications and remote work scenarios.
Mitigation efforts primarily involve updating Google Chrome to version 152.0.7977.65 or later, which includes patches addressing the input validation logic within the Media component. Organizations should enforce automated patch management policies to ensure timely deployment of security updates across all endpoints. Additionally, users can reduce exposure by disabling JavaScript execution for untrusted sites using browser flags or extensions, although this may impact functionality. Security teams should also monitor network traffic and endpoint logs for indicators of compromise associated with known exploit kits targeting Chromium-based browsers. Regular vulnerability assessments and penetration testing focused on web application security can help identify similar input validation weaknesses in custom-built applications that rely on embedded browser components.
This incident underscores the importance of rigorous code review processes, particularly for complex subsystems like media handling which involve intricate interactions between JavaScript engines and native C++ code. Developers must implement strict type checking, bounds verification, and state machine validations to prevent malformed inputs from reaching critical execution paths. Adherence to secure coding standards such as those outlined in OWASP guidelines can further reduce the likelihood of similar vulnerabilities emerging in future releases. Continuous monitoring of threat intelligence feeds related to browser exploitation techniques will also aid in proactive defense against evolving attack vectors targeting Chromium-based platforms.