CVE-2026-79284 in Chrome
Summary
by MITRE • 08/26/2026
UI misrepresentation in Core in Google Chrome on on Mac prior to 152.0.7977.65 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 • 08/26/2026
The vulnerability identified as a user interface misrepresentation in Google Chrome on Mac prior to version 152.0.7977.65 represents a sophisticated attack vector that exploits the browser's rendering engine and its interaction with the operating system's graphical layer. This flaw is categorized under CWE-83, which describes spoofing of user interface elements, indicating an intent to deceive users by presenting false information or mimicking legitimate application components. The severity is assessed as low within the Chromium security framework because it requires a specific precondition: the attacker must already have compromised the renderer process. This condition implies that the vulnerability does not allow for initial unauthorized access but rather serves as a mechanism to escalate trust and manipulate user behavior after an initial breach has occurred, such as through a successful cross-site scripting attack or exploitation of another rendering engine flaw.
From a technical perspective, this issue arises from how Chrome handles UI elements within its multi-process architecture on macOS. When the renderer process is compromised by malicious code embedded in a crafted HTML page, it gains limited but significant capabilities to interact with the browser's chrome layer. The attacker can inject or modify visual components that appear as part of the legitimate browser interface rather than just content within the web page itself. This could involve creating fake dialog boxes, altering address bar indicators, or mimicking security warnings and certificate validation messages. By leveraging these UI spoofing techniques, an adversary can create a convincing illusion of legitimacy, making it difficult for users to distinguish between genuine browser prompts and malicious overlays designed to harvest credentials or trick them into executing harmful actions.
The operational impact of this vulnerability is primarily centered around social engineering and trust manipulation rather than direct system compromise or data exfiltration through the flaw itself. Since the renderer process is already compromised, the attacker likely has access to sensitive web content or session cookies. The UI misrepresentation serves as a force multiplier for these existing capabilities by increasing the likelihood of user interaction with malicious payloads. For instance, an attacker might display a fake password reset dialog that appears to originate from Chrome itself, prompting the victim to enter their master key or other authentication details into a controlled field. This erodes the security boundary between trusted browser interfaces and untrusted web content, potentially leading to credential theft, session hijacking, or further malware installation if users are tricked into downloading files under false pretenses.
Mitigation strategies for this vulnerability focus on both immediate patching and long-term architectural improvements. The primary defense is upgrading Google Chrome to version 152.0.7977.65 or later, where the specific UI rendering logic has been corrected to prevent renderer processes from improperly injecting elements into the chrome layer. Additionally, users should maintain strict security hygiene by monitoring for unexpected browser behavior and verifying the authenticity of any dialog boxes through secondary channels if suspicious activity is detected. From a development standpoint, this incident highlights the importance of enforcing stricter sandboxing boundaries between renderer processes and UI components. Implementing robust content security policies and ensuring that all user-facing elements are rendered in isolated contexts can further reduce the attack surface for such spoofing attacks.
In terms of industry standards mapping, this vulnerability aligns with MITRE ATT&CK technique T1078, specifically valid accounts or trusted relationships exploitation, as it relies on a compromised renderer to gain trust. It also relates to T1653, site deception techniques, where attackers use UI spoofing to mimic legitimate services. The CWE-83 classification underscores the fundamental design flaw in allowing untrusted content to influence high-trust interface elements. Addressing such issues requires continuous refinement of browser security models to ensure that even if a renderer is breached, its ability to deceive users through visual manipulation remains severely restricted. This approach minimizes the potential for secondary attacks that rely on user confusion and trust exploitation rather than technical privilege escalation alone.