CVE-2026-106320 in Chrome
Summary
by MITRE • 10/06/2026
Use of released resource in UI 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)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6789 represents an improper resource management flaw within the user interface layer of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This issue stems from a failure in the browser's internal logic to properly handle or invalidate resources associated with UI elements after they have been released by the rendering engine. In modern web browsers like Chromium-based applications, the architecture is divided into distinct processes for security isolation, primarily separating the renderer process which handles untrusted web content from the browser process that manages user interface components and sensitive operations. When a webpage triggers an action that results in the release of certain UI resources without adequate synchronization or state validation, it creates a window where stale references to these elements may persist in memory.
From a technical perspective, this flaw allows for a spoofing attack vector known as UI redressing or clickjacking variants when combined with renderer compromise. An attacker who has successfully exploited a separate vulnerability within the renderer process can craft malicious HTML and JavaScript code that interacts with the browser's interface layer. By exploiting the race condition or state inconsistency caused by the released resource, the attacker can manipulate the visual presentation of the browser window. This might involve overlaying deceptive elements over legitimate UI controls, such as address bars, download buttons, or security indicators, thereby misleading the user into interacting with malicious content while believing they are engaging with a trusted interface element. The Chromium project has classified this issue with a Low severity rating because it requires prior compromise of the renderer process, which is already considered a high-risk state where an attacker typically possesses significant capabilities to read arbitrary memory or execute code within that sandboxed environment.
The operational impact of this vulnerability lies in its potential to facilitate social engineering attacks and undermine user trust in browser security indicators. If successful, an adversary could trick users into entering credentials on a fake login page disguised as part of the legitimate UI, or initiate unintended downloads by spoofing download prompts. While the direct exploitation chain is complex due to the prerequisite renderer compromise, this flaw reduces the barrier for attackers who have already breached the sandbox boundary through other means. It effectively extends their influence from data exfiltration within the renderer to manipulating user perception and interaction at the application level. This aligns with common attack patterns found in industry frameworks such as MITRE ATT&CK, specifically under techniques related to UI redressing or spoofing of interface elements, which aim to bypass security warnings by making malicious actions appear legitimate.
To mitigate this risk, organizations must ensure that all instances of Google Chrome are updated to version 155.0.8059.39 or later where the underlying resource management logic has been corrected. The fix likely involves implementing stricter checks on UI element lifecycle states and ensuring that released resources cannot be referenced by subsequent operations within the browser process. Additionally, since this vulnerability relies on a compromised renderer, maintaining robust endpoint detection and response capabilities is crucial to identify any signs of sandbox escape attempts early in the attack chain. Users should also remain vigilant against suspicious prompts or interface anomalies, although relying solely on user vigilance is insufficient given the sophistication of modern web exploits. Regular patching cycles are essential to close these gaps before they can be leveraged in conjunction with other vulnerabilities for more severe impacts.