CVE-2026-106413 in Chrome
Summary
by MITRE • 10/07/2026
Race condition in Browser in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to spoof UI elements via a crafted HTML page. (Chromium security severity: Low)
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6789 represents a race condition within the user interface rendering logic of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This flaw arises from improper synchronization mechanisms when handling asynchronous events related to DOM manipulation and UI state updates. In modern browser architectures, particularly those based on Chromium, multiple processes operate concurrently, including the renderer process which handles web content execution and the main browser process responsible for managing user interface elements such as tabs, address bars, and navigation controls. The race condition occurs when there is a timing window between the initiation of a UI update request by the renderer process and the actual application of that state change in the browser's visual layer. This temporal gap allows an attacker to inject or manipulate data into this window, leading to inconsistent states where the displayed interface does not accurately reflect the underlying security context or user intent.
From a technical perspective, this vulnerability leverages the complexity inherent in multi-process architecture and asynchronous JavaScript execution. When a malicious HTML page is loaded, it can trigger rapid sequences of events that interact with browser chrome elements rather than just the webpage content itself. By carefully crafting these interactions, an attacker can exploit the race condition to spoof UI elements. This might involve making phishing indicators appear legitimate or altering the appearance of security warnings and navigation buttons. The severity is classified as Low by Chromium because successful exploitation requires a pre-existing compromise of the renderer process. In standard threat models, if an attacker has already gained code execution within the sandboxed renderer environment through another vulnerability such as a cross-site scripting flaw or a memory corruption bug, they are effectively inside the browser's trusted boundary for that tab. The race condition serves as a secondary exploitation vector to escalate trust from the untrusted web content context to the more privileged UI layer, potentially bypassing user perception of security boundaries.
The operational impact of this vulnerability centers on social engineering and phishing attacks. By spoofing UI elements, an attacker can create highly convincing fake login pages or deceptive navigation cues that mimic official browser interfaces or trusted websites. For instance, an attacker could manipulate the address bar display to show a legitimate domain while serving malicious content from a different source, thereby undermining user trust in URL verification mechanisms. This erosion of visual integrity facilitates credential harvesting and session hijacking attacks where users are tricked into interacting with compromised elements under false pretenses. Although the direct technical impact is limited by the requirement for renderer compromise, the psychological impact on end-users can be significant, leading to broader security breaches if users fall victim to these sophisticated deceptions.
Mitigation strategies primarily involve updating Google Chrome to version 155.0.8059.39 or later, where the synchronization logic has been hardened to prevent such race conditions from being exploitable. Developers and system administrators should ensure that automatic updates are enabled for all endpoints running affected versions of the browser. For organizations unable to patch immediately due to compatibility concerns, implementing strict Content Security Policies can help mitigate some aspects of renderer compromise by limiting script execution capabilities. Additionally, user education regarding verifying URL authenticity through multiple indicators beyond just visual appearance remains critical. Monitoring network traffic and endpoint behavior for anomalies consistent with UI spoofing attempts may also provide early detection signals in environments where patch deployment is delayed.
This vulnerability aligns with CWE-362, which describes concurrent access to shared resources without proper locking or synchronization mechanisms leading to race conditions. It also relates to ATT&CK technique T1078, Valid Accounts, specifically within the context of impersonation and trust exploitation in browser environments. The attack pattern reflects a broader class of issues where application state management fails under high-concurrency scenarios, emphasizing the need for rigorous testing of asynchronous operations in complex software systems like web browsers.