CVE-2026-78968 in Chrome
Summary
by MITRE • 08/25/2026
Missing authorization in Core in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to potentially spoof address bar via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 08/25/2026
The vulnerability identified as missing authorization within the core components of Google Chrome prior to version 152.0.7977.65 represents a significant breach in browser process isolation boundaries, specifically affecting the privilege escalation path from renderer processes to higher-privilege contexts. This flaw allows an attacker who has already achieved code execution or arbitrary script injection within a compromised renderer process to manipulate the user interface elements of the browser, most notably the address bar. The severity is classified as low by Chromium security standards because it requires prior compromise of the sandboxed renderer environment, yet its impact on trust and phishing mitigation strategies remains substantial due to the potential for visual spoofing attacks that deceive users into believing they are interacting with a legitimate or safe website when they are not.
From a technical perspective, modern browsers like Chrome rely heavily on process isolation to contain damage from web content execution. The renderer processes operate in a restricted sandbox environment designed to prevent access to sensitive system resources and browser internals. However, this vulnerability indicates that certain internal APIs or UI update mechanisms lacked proper authorization checks when invoked by untrusted code originating from the renderer layer. By exploiting this gap, an attacker can send commands to the main browser process to alter the displayed URL in the address bar without actually navigating to that location. This creates a discrepancy between the actual network request being made and the visual representation shown to the user, effectively breaking the trust model that relies on the address bar as a primary indicator of site identity for end-users.
The operational impact of this vulnerability centers on its utility in sophisticated phishing campaigns. Attackers can craft malicious HTML pages or exploit other vulnerabilities within web content to trigger this spoofing behavior. When a victim visits such a page, their browser might display a trusted domain name like https://bank.example.com in the address bar while simultaneously loading and executing malicious scripts from an attacker-controlled server at http://evil.attacker.com. This technique bypasses user vigilance regarding URL verification and certificate warnings, as the visual cues suggest a secure connection to a legitimate entity. Consequently, this can lead to credential theft, session hijacking, or further malware delivery under the guise of trusted services, significantly increasing the success rate of social engineering attacks that depend on mimicking authentic interfaces.
In terms of industry classification frameworks, this issue aligns with CWE-269, which denotes Improper Privilege Assignment, as it involves a process operating outside its intended permissions to modify UI state. It also relates closely to CWE-749, Exposed Dangerous Method or Function, where an internal function is accessible to untrusted input without adequate validation. From the perspective of the MITRE ATT&CK framework for enterprise security, this behavior falls under T1078 Valid Accounts and potentially supports techniques within the Initial Access or Persistence phases if used in conjunction with other exploits, but most directly it facilitates Phishing (T1566) by enhancing the credibility of deceptive content. The ability to spoof UI elements is a critical capability for attackers aiming to evade detection mechanisms that rely on visual confirmation rather than deep packet inspection or behavioral analysis alone.
Mitigation strategies primarily involve updating Google Chrome to version 152.0.7977.65 or later, where the authorization checks within the core components have been strengthened to prevent renderer processes from manipulating UI elements without proper validation. Organizations should enforce strict browser update policies across all endpoints to ensure that known vulnerabilities in widely used software are patched promptly. Additionally, security awareness training for users remains vital; while technical controls reduce risk, educating employees and customers about verifying actual network connections through secondary means such as checking certificate details or using multi-factor authentication can provide defense-in-depth against successful spoofing attempts. Monitoring browser logs for unusual patterns of UI manipulation requests from renderer processes may also aid in detecting active exploitation attempts in real-time environments before significant damage occurs.