CVE-2026-106265 in Chrome
Summary
by MITRE • 10/06/2026
UI misrepresentation in File in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as a user interface misrepresentation within the Chromium-based Google Chrome browser, specifically prior to version 155.0.8059.39, represents a significant risk related to social engineering and phishing attacks. This flaw allows an attacker who hosts or controls a malicious HTML page to manipulate how certain UI elements are rendered in the user's view. By crafting specific web content that exploits rendering inconsistencies or logic errors within the browser’s interface layer, the adversary can create visual discrepancies between what is displayed on the screen and the actual underlying state of the application. This technique relies heavily on deceiving the end-user rather than exploiting a direct code execution flaw in the core engine, making it a classic example of an attack that targets human perception and trust mechanisms within digital interfaces.
From a technical perspective, this issue falls under the category of UI redressing or clickjacking variants where the visual presentation is decoupled from functional reality. The attacker leverages crafted HTML structures to overlay deceptive elements over legitimate interface components or to alter the appearance of navigation bars, address fields, and security indicators. When users interact with these spoofed elements, they may believe they are performing actions on a trusted domain while actually interacting with malicious content hosted elsewhere. This misrepresentation can lead users into entering sensitive credentials, downloading malware, or authorizing unauthorized transactions under false pretenses. The severity is classified as medium because it requires user interaction and social engineering to succeed, yet its potential for widespread impact through phishing campaigns remains high due to the ease of deployment via standard web technologies.
In terms of industry standards classification, this vulnerability aligns with CWE-203: Observable Discrepancy, which describes situations where a system provides information that differs from what is actually occurring or available. It also relates closely to CWE-441: Unintended Proxy or Intermediary if the spoofing facilitates an intermediary role in data transmission. Furthermore, within the MITRE ATT&CK framework, this technique corresponds to T1089 Disguise Traffic as Legitimate Network Traffic and potentially T1566 Phishing when used in conjunction with deceptive email campaigns. The attack vector is primarily remote via network access but requires a human user to be tricked into visiting the malicious site or interacting with its content, placing it firmly within the social engineering domain of cyber threats.
The operational impact of this vulnerability extends beyond immediate data theft to include long-term erosion of trust in browser security indicators. If users cannot rely on the visual cues provided by their web browser regarding identity and context, they become more susceptible to sophisticated phishing attempts that mimic legitimate services such as banking portals, email providers, or enterprise login screens. Attackers can exploit this flaw to create convincing replicas of trusted websites where subtle differences in UI layout, color schemes, or button placement are used to confuse the user into submitting sensitive information. This undermines the fundamental security model of web browsers which depends on users correctly interpreting visual signals about site authenticity and connection security.
Mitigation strategies for this vulnerability primarily involve updating the browser software to version 155.0.8059.39 or later, where Google has addressed the underlying rendering logic errors that allowed for such UI manipulation. Organizations should enforce strict update policies across all endpoints running Chrome to ensure users benefit from these security patches promptly. Additionally, user awareness training is critical in mitigating residual risks; employees and general users must be educated to verify URLs carefully rather than relying solely on visual appearance or familiar layouts which can now be spoofed more effectively due to this flaw. Security teams should also monitor for indicators of compromise associated with phishing campaigns that utilize these specific UI deception techniques, looking for patterns in malicious HTML payloads designed to exploit rendering inconsistencies.