CVE-2026-106365 in Chrome
Summary
by MITRE • 10/07/2026
Missing authorization in Animation in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to bypass web origin policy 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 missing authorization within the animation subsystem of Google Chrome, specifically in versions prior to 155.0.8059.39, represents a critical failure in access control mechanisms governing web origin policies. This flaw allows a remote attacker to bypass standard browser security boundaries by crafting malicious HTML pages that exploit inconsistencies in how animations are processed and authorized across different origins. The core technical issue lies in the improper validation of permissions when handling animation events or state changes triggered from external sources, effectively permitting cross-origin data access or manipulation that should be strictly prohibited under normal browsing conditions.
From a technical perspective, this vulnerability falls squarely within the CWE-269 classification for Improper Privilege Management and aligns with ATT&CK technique T1059 Command and Scripting Interpreter through HTML-based attacks. The attacker leverages specially crafted web content to trigger animation sequences that interact with internal browser components without proper authorization checks. By manipulating these animations, the malicious page can execute actions or access resources associated with a different origin than its own, thereby violating the same-origin policy which is fundamental to modern web security architectures designed to isolate potentially hostile code from sensitive data and functions.
The operational impact of this vulnerability enables remote attackers to perform unauthorized cross-origin requests, potentially leading to information disclosure where sensitive user data hosted on legitimate websites could be exfiltrated through manipulated animation states. Additionally, it may facilitate further exploitation chains such as clickjacking or session hijacking if the animated elements interact with authentication tokens or critical UI components in ways that bypass intended restrictions. The medium severity rating assigned by Chromium reflects the potential for significant compromise while acknowledging that successful exploitation requires specific user interaction and crafted payloads rather than fully automated remote code execution.
Mitigation strategies primarily involve upgrading to Google Chrome version 155.0.8059.39 or later where these authorization checks have been reinforced within the animation handling subsystem. Organizations should enforce strict browser update policies across all endpoints to ensure that known vulnerabilities in widely used web browsers are promptly patched. Furthermore, implementing Content Security Policy headers can provide an additional layer of defense by restricting how resources and scripts interact with each other, reducing the attack surface even if a specific vulnerability like this one is present but not yet fully exploitable due to environmental constraints or user behavior patterns that prevent direct interaction with crafted payloads.