CVE-2026-106348 in Chrome
Summary
by MITRE • 10/07/2026
Information leak in Animation in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to leak sensitive information 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 an information leak within the animation subsystem of Google Chrome, specifically affecting versions prior to 155.0.8059.39, represents a significant risk to user privacy and data confidentiality. This flaw resides in the rendering engine responsible for processing CSS animations and transitions, which are fundamental components of modern web page interactivity. The core technical issue stems from improper handling of animation state or timing information during the composition phase of the browser's graphics pipeline. When a malicious actor constructs an HTML page with specifically crafted animation sequences, they can exploit race conditions or memory access patterns that expose internal browser states to external scripts. This allows code executing within the context of a victim’s browsing session to read sensitive data that should remain isolated from web content, such as layout dimensions, computed styles, or potentially other cross-origin information depending on the specific implementation details of the animation engine at the time.
From an operational perspective, this vulnerability enables remote attackers to conduct sophisticated surveillance and fingerprinting activities against users without their knowledge or consent. By leveraging the crafted HTML page, an attacker can extract precise measurements of elements that are typically hidden or not directly accessible via standard Document Object Model APIs. This capability facilitates advanced browser fingerprinting techniques, where unique identifiers derived from these leaked values are used to track user behavior across different websites and sessions. Furthermore, in scenarios involving sensitive web applications, such as banking portals or enterprise dashboards, the leakage of layout information could aid attackers in understanding the structure of a target interface, potentially aiding in subsequent phishing attacks or cross-site scripting exploits by revealing the exact positioning and properties of form fields and security controls.
The severity of this vulnerability is classified as medium within the Chromium project’s internal scoring system, reflecting its potential for privacy violation rather than immediate remote code execution or full system compromise. However, the impact on individual user privacy remains high due to the pervasive nature of web tracking technologies. The flaw aligns with Common Weakness Enumeration category CWE-200, which covers Information Exposure, specifically detailing how sensitive information is made available to unauthorized actors through improper handling in software components. In terms of offensive security frameworks, this vulnerability supports techniques associated with ATT&CK ID T1598, Phishing for Information, as it enhances the efficacy of social engineering campaigns by providing attackers with deeper insights into a victim’s environment and browsing habits.
Mitigation strategies primarily involve updating to the patched version of Google Chrome, which addresses the underlying logic errors in the animation processing module. Administrators should ensure that automatic updates are enabled or manually deploy the latest stable release immediately upon availability. For organizations managing large fleets of devices, endpoint detection and response solutions can be configured to monitor for unusual network traffic patterns indicative of data exfiltration via crafted web pages, although direct mitigation at this stage is limited without patching. Users should also exercise caution when visiting untrusted websites or clicking on links from unknown sources, as the exploit requires user interaction with a malicious page to trigger the information leak. Continued monitoring of browser security advisories and adherence to best practices for browsing hygiene remain essential defenses against such web-based vulnerabilities.