CVE-2026-78912 in Chrome
Summary
by MITRE • 08/25/2026
UI misrepresentation in Browser in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 08/25/2026
The vulnerability identified as a user interface misrepresentation flaw within the Chromium-based browser architecture, specifically affecting versions of Google Chrome prior to 152.0.7977.65, represents a significant risk related to social engineering and identity spoofing. This security issue stems from an improper handling of rendering logic that allows a remote attacker to manipulate how specific user interface elements are displayed on the screen. By crafting a malicious HTML page containing specially designed code, an adversary can exploit this flaw to make deceptive content appear as legitimate browser components or trusted system interfaces. The core technical failure lies in the separation between the visual presentation layer and the underlying security context, allowing crafted markup to override standard display rules for address bars, certificate indicators, or other trust signals that users rely upon to verify website authenticity.
From a technical perspective, this vulnerability falls under the category of UI redressing attacks, which are formally classified within the Common Weakness Enumeration as CWE-1021: Improper Restriction of Rendered UI Layers or Frames. The exploit mechanism typically involves manipulating CSS properties, JavaScript DOM manipulation techniques, or iframe embedding strategies to overlay deceptive elements over legitimate content or to alter the visual representation of secure indicators such as HTTPS lock icons. When a user interacts with the spoofed interface, they may be led to believe that their connection is encrypted and verified by a trusted certificate authority when it is not, or that they are interacting with an official login portal rather than a phishing site. This misrepresentation undermines the fundamental trust model of web browsing, where visual cues serve as primary indicators for security status.
The operational impact of this vulnerability is primarily centered on facilitating credential theft and malware distribution through enhanced social engineering tactics. Attackers can create highly convincing fake login pages that mimic popular services such as email providers, banking institutions, or enterprise single sign-on portals with greater fidelity than traditional phishing attempts. Because the browser itself appears to be displaying legitimate security indicators due to the UI spoofing, victims are significantly more likely to enter sensitive information without suspicion. This leads directly to unauthorized access to user accounts, financial fraud, and potential compromise of corporate networks if credentials for internal systems are harvested. The severity is rated as medium because while it does not allow direct code execution or remote control of the system, it effectively bypasses human-based security controls that rely on visual verification.
In terms of threat intelligence frameworks, this vulnerability aligns with MITRE ATT&CK technique T1498: Network Sniffing and specifically relates to aspects of social engineering where deceptive interfaces are used to harvest credentials or install malware. It also intersects with the broader category of phishing attacks by enhancing the credibility of malicious sites through visual deception rather than just content mimicry. The exploitation requires no special privileges on the victim's machine, as it is triggered simply by visiting a crafted webpage via standard browser navigation, making it accessible to any remote attacker who can host or distribute such pages through email attachments, social media links, or compromised websites.
Mitigation for this vulnerability relies primarily on prompt software updates and patch management procedures. Administrators must ensure that all endpoints running Google Chrome are updated to version 152.0.7977.65 or later, where the rendering engine has been corrected to properly isolate UI elements from malicious styling scripts. In environments where immediate patching is not feasible, security awareness training becomes critical; users should be educated to verify URLs manually by inspecting the address bar for exact domain names rather than relying solely on visual cues like lock icons which can now be spoofed. Additionally, deploying browser extension-based security tools that enforce strict content security policies and validate certificate chains independently of UI rendering can provide an additional layer of defense against such deceptive practices. Regular auditing of installed extensions is also recommended to prevent any third-party scripts from interfering with the browser's native interface behavior.