CVE-2026-95364 in Chrome
Summary
by MITRE • 09/29/2026
Improper input validation in Passwords in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified as an improper input validation flaw within the password handling mechanisms of Google Chrome versions prior to 154.0.8037.57 represents a significant risk related to user interface spoofing and potential credential theft through social engineering techniques. This specific defect arises from insufficient sanitization or verification processes applied when processing inputs associated with password fields, allowing an attacker to manipulate the visual presentation of authentication prompts or login forms embedded within web pages. By crafting a malicious HTML page that exploits this validation gap, an adversary can inject deceptive elements that mimic legitimate browser interfaces or trusted websites, thereby confusing users into entering sensitive credentials into unauthorized contexts.
From a technical perspective, this issue falls under the category of UI Redressing attacks, which are formally classified in the Common Weakness Enumeration (CWE) database as CWE-836: Use of Password Field for User Input and potentially CWE-20: Improper Input Validation depending on the specific vector used to bypass checks. The core mechanism involves manipulating how the browser renders password fields or associated dialog boxes, making them appear indistinguishable from genuine system prompts or legitimate site login forms. This deception relies heavily on visual cues such as layout consistency, font rendering, and iconography that users typically associate with secure connections. When these elements are spoofed, the user loses their ability to verify the authenticity of the domain requesting authentication, leading directly to credential compromise if they proceed with entering data.
The operational impact of this vulnerability is primarily centered on confidentiality breaches resulting from successful phishing campaigns facilitated by technical exploitation rather than purely social engineering alone. An attacker leveraging this flaw can create a seamless experience where the victim believes they are interacting with a trusted service, such as an email provider or financial institution, while actually submitting their username and password to a malicious server controlled by the adversary. This undermines the fundamental trust model of web browsers, which rely on users recognizing standard interface patterns to maintain security boundaries between different origins. The severity is rated as low within the Chromium project because it requires user interaction with a crafted page and does not allow for arbitrary code execution or direct system compromise, but its effectiveness in real-world phishing scenarios remains high due to the sophistication of modern UI spoofing techniques.
Mitigation strategies focus on both immediate patching and long-term architectural improvements. The primary defense is upgrading Google Chrome to version 154.0.8037.57 or later, where these input validation checks have been strengthened to prevent unauthorized manipulation of password field rendering. Additionally, developers should implement strict Content Security Policy (CSP) directives that restrict the loading of external resources and enforce same-origin policies for sensitive form submissions. Browsers also employ features like origin-bound cookies and secure flag enforcement to limit data leakage even if UI spoofing occurs. For end-users, maintaining awareness of URL bar indicators and avoiding interaction with unexpected authentication prompts remains a critical layer of defense against such attacks aligned with MITRE ATT&CK technique T1566.002: Spearphishing Link which often utilizes these visual deceptions to harvest credentials.