CVE-2026-110137 in Chrome
Summary
by MITRE • 10/13/2026
Use after free in WebRTC in Google Chrome prior to 155.0.8059.79 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 • 10/13/2026
The vulnerability identified as a use-after-free flaw within the WebRTC component of Google Chrome prior to version 155.0.8059.79 represents a critical memory management error that allows for arbitrary code execution under specific conditions. This class of defect occurs when a program continues to use a pointer after it has been freed, leading to undefined behavior that can be exploited by malicious actors. In the context of WebRTC, which handles real-time communication data such as audio and video streams, improper handling of memory allocation and deallocation during session negotiation or media processing creates an opportunity for attackers to manipulate heap structures. When a remote attacker crafts a specific HTML page containing malicious JavaScript code that triggers this sequence, they can cause the browser to access freed memory regions, potentially overwriting adjacent objects with controlled data.
From a technical perspective, this vulnerability aligns closely with CWE-416, which defines use-after-free as accessing memory after it has been released without proper reallocation or nullification of the pointer. The exploitation vector involves delivering a crafted HTML page that leverages WebRTC APIs to trigger the premature deallocation of an object while retaining references to it elsewhere in the application state. By carefully crafting heap spray techniques and controlling the content written into the freed memory, an attacker can achieve arbitrary read and write primitives within the browser process. This capability is particularly dangerous because it bypasses many standard security controls that rely on predictable memory layouts or strict type safety during runtime operations.
The operational impact of this vulnerability is severe due to its potential for remote code execution inside the sandboxed environment of Chrome. Although modern browsers employ robust sandboxing mechanisms designed to limit the damage caused by successful exploits, achieving arbitrary code execution within the renderer process significantly increases the risk of privilege escalation or further lateral movement if additional vulnerabilities are present in the path from the renderer to higher-privilege processes. The Chromium security severity rating of High reflects this potential for significant compromise, as it enables an attacker to execute arbitrary commands on the victim's system under the context of the browser user account. This can lead to data theft, installation of malware, or complete control over the affected machine depending on subsequent exploitation steps and existing mitigations like ASLR and DEP.
To mitigate this risk, organizations should ensure that all instances of Google Chrome are updated to version 155.0.8059.79 or later immediately upon availability. This patch includes fixes for the underlying memory management issues within the WebRTC module, preventing the use-after-free condition from occurring during normal operation. Additionally, users can reduce exposure by disabling unnecessary browser features such as WebRTC if they are not required for their workflow, although this may impact functionality of legitimate web applications relying on real-time communication capabilities. Security teams should also monitor for indicators of compromise associated with exploit kits targeting Chrome vulnerabilities and enforce strict content security policies to restrict the execution of untrusted scripts from unknown origins.
This incident highlights the importance of rigorous memory safety practices in complex software components like WebRTC, which involve intricate state management and asynchronous operations. The ATT&CK framework categorizes such exploitation techniques under T1203, specifically focusing on exploit drivers or frameworks used to leverage vulnerabilities for initial access. By understanding these patterns, security professionals can better anticipate attack vectors and prioritize patching efforts based on the severity ratings provided by vendors like Google Chrome's Chromium team. Continuous monitoring of browser update cycles remains essential in maintaining a secure posture against evolving web-based threats that target common components widely deployed across enterprise environments.