CVE-2026-79083 in Chrome
Summary
by MITRE • 08/26/2026
Improper enforcement of behavioral workflow in Media 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: Medium)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an improper enforcement of behavioral workflow within Google Chrome prior to version 152.0.7977.65 represents a significant breach in the browser's process isolation model, specifically targeting the media subsystem. This flaw stems from a logic error where the application fails to correctly validate or restrict certain actions performed by renderer processes when interacting with multimedia components. In modern web browsers like Chrome, security relies heavily on sandboxing, which confines untrusted code executed within renderer processes to prevent them from accessing sensitive system resources or executing arbitrary commands on the host operating system. The specific failure in this instance allows a compromised renderer process to bypass these containment mechanisms through crafted HTML content that exploits the media handling routines.
From a technical perspective, the core issue lies in how the browser handles state transitions and command execution within its multimedia pipeline. When a user visits a maliciously constructed webpage, the embedded media elements trigger specific internal workflows designed for legitimate playback or processing tasks. However, due to insufficient checks on the sequence of operations or the context in which these commands are issued, an attacker can manipulate the renderer process to perform actions that should be restricted to higher-privilege processes. This misalignment between expected behavior and actual execution enables the renderer to escape its sandbox boundaries. The severity is classified as medium by Chromium security standards because while it requires a compromised renderer or successful exploitation of another vulnerability within the same context, the resulting impact allows for arbitrary code execution outside the protected environment, which is a critical escalation in privilege levels.
The operational impact of this vulnerability is severe for end-users and enterprise environments alike. If an attacker successfully exploits this flaw through a remote attack vector such as a phishing email or a compromised website hosting malicious JavaScript, they can achieve full control over the user's system without triggering typical sandbox alerts. This capability effectively neutralizes one of Chrome's primary defense-in-depth layers. Once arbitrary code is executed outside the sandbox, the attacker gains access to sensitive data stored on the local machine, including credentials, cookies, and personal files. Furthermore, this level of access facilitates further lateral movement within a network if the compromised device serves as an entry point for broader attacks against corporate infrastructure.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-841, which describes Improper Enforcement of Behavioral Workflow. It also maps to MITRE ATT&CK techniques related to process injection and sandbox escape, specifically those involving browser-based exploitation vectors where attackers leverage legitimate system processes or components to hide their activities and elevate privileges. The lack of strict enforcement allows the malicious payload to blend in with normal media processing operations, making detection by standard endpoint security solutions more difficult without specialized behavioral analysis tools.
To mitigate this risk, organizations must ensure that all instances of Google Chrome are updated to version 152.0.7977.65 or later immediately upon availability. Patch management systems should be configured to prioritize browser updates due to the high prevalence of web-based attack vectors targeting browsers. Additionally, administrators can enforce stricter content security policies and utilize extension whitelisting to reduce the surface area for potential renderer compromises that could lead up to this specific flaw being exploited. Monitoring network traffic for unusual outbound connections from browser processes may also provide early indicators of compromise attempts leveraging such sandbox escape techniques. Regular audits of web application code served by internal sites can help prevent the delivery of crafted HTML pages designed to trigger these workflow violations, thereby reducing exposure to remote exploitation scenarios.