CVE-2026-106190 in Chrome
Summary
by MITRE • 10/06/2026
Use after free in Media in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as a use-after-free flaw within the media subsystem of Google Chrome prior to version 155.0.8059.39 represents a critical memory management error that compromises the integrity and confidentiality of user data. This specific class of vulnerabilities occurs when an application continues to reference a pointer after the memory it points to has been freed, leading to undefined behavior that can be exploited by malicious actors. In this instance, the flaw resides within the complex media handling components responsible for processing audio and video streams, which are frequently targeted due to their complexity and frequent interaction with external inputs such as HTML5 elements or embedded plugins.
The operational mechanism of this exploit relies on a crafted HTML page designed to trigger specific race conditions or state transitions that cause the browser to release memory associated with media objects while retaining active references to those same memory addresses. When an attacker hosts or distributes such a webpage, they can manipulate the timing and sequence of operations to ensure that freed memory is reallocated for malicious purposes rather than being safely reclaimed by the operating system's garbage collector. This allows the injection of arbitrary code into the process space of the browser, effectively bypassing standard safety checks intended to isolate web content from the underlying host system.
From a security architecture perspective, this vulnerability directly undermines the sandboxing mechanisms implemented in Chromium-based browsers. The primary defense against remote code execution via web exploits is the separation of privileges between renderer processes and the main browser process or operating system kernel. By achieving arbitrary code execution within the sandboxed environment, an attacker can potentially escalate their privileges to access sensitive user data, install persistent malware, or pivot further into a network if additional vulnerabilities are present. The Chromium security severity rating of High reflects the significant risk posed by this flaw, as it enables remote attackers to achieve full control over the victim's browser session without requiring any physical interaction beyond visiting a malicious site.
This incident aligns with common vulnerability classifications found in industry standards such as CWE-416, which defines use-after-free errors where references are made to memory after it has been freed. Furthermore, from an adversary tactics perspective, this exploit technique corresponds to ATT&CK techniques related to initial access and execution via web browsers, specifically leveraging client-side scripting or embedded content to deliver payloads. The ability to execute code inside the sandbox highlights a failure in boundary enforcement within the media processing pipeline, emphasizing the importance of rigorous memory safety practices in high-level languages like C++ which are commonly used in browser engines for performance reasons.
Mitigation strategies primarily involve updating Google Chrome to version 155.0.8059.39 or later, where these memory management issues have been resolved through code patches that ensure proper lifecycle management of media objects and prevent dangling pointer dereferences. Organizations should enforce automated update policies across all endpoints running Chromium-based browsers to minimize the window of exposure. Additionally, security teams can implement browser hardening techniques such as disabling unnecessary plugins or restricting script execution in untrusted domains using content security policies where applicable. Monitoring for anomalous network traffic originating from browser processes may also help detect exploitation attempts in real-time before significant damage occurs.