CVE-2026-106304 in Chrome
Summary
by MITRE • 10/06/2026
Out of bounds read in ANGLE in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory outside the sandbox 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 out-of-bounds read within the ANGLE graphics library in Google Chrome prior to version 155.0.8059.39 represents a significant memory safety flaw that undermines the browser's sandboxing mechanisms. ANGLE, which serves as the translation layer between web applications and native GPU drivers, is critical for rendering complex visual content on the web. When this component processes malformed or specially crafted input data embedded within an HTML page, it fails to properly validate array indices or buffer boundaries before accessing memory locations. This lack of rigorous bounds checking allows the application to read from memory addresses that lie outside the intended allocation scope, leading to a classic out-of-bounds read condition.
From a technical perspective, this flaw is categorized under CWE-125, which defines an out-of-bounds read vulnerability where software reads data past the end or before the beginning of the intended buffer. In the context of browser security, such vulnerabilities are particularly dangerous because they can be triggered remotely by simply visiting a maliciously crafted webpage. The attacker constructs an HTML page containing specific JavaScript code and graphics commands that exploit the parsing logic within ANGLE to force the GPU driver interface to access unauthorized memory regions. Because this occurs during the rendering process, it happens in a context where memory isolation is paramount for preventing data leakage from one tab or origin to another.
The operational impact of this vulnerability extends beyond simple information disclosure. While classified with a medium severity by Chromium security teams due to the complexity often required to reliably exploit out-of-bounds reads without causing crashes, the potential consequences are severe if successfully leveraged. An attacker can potentially read sensitive data from adjacent memory spaces, such as credentials stored in other tabs, session tokens, or internal browser structures that contain pointers and metadata necessary for further exploitation. This aligns with ATT&CK technique T1005, which involves Data from Local System, specifically the sub-technique of reading local files or memory dumps to gather intelligence before launching more targeted attacks against the user's system.
Mitigation strategies primarily rely on timely software updates and defense-in-depth practices. Users must upgrade Google Chrome to version 155.0.8059.39 or later, where these bounds checking mechanisms have been hardened to prevent unauthorized memory access. For organizations managing large fleets of devices, deploying automated patch management solutions ensures that this vulnerability is addressed across all endpoints promptly. Additionally, enabling sandboxing features and restricting the permissions granted to browser plugins can reduce the attack surface. Security teams should also monitor for indicators of compromise related to unusual GPU driver behavior or unexpected network connections originating from browser processes, as these may signal active exploitation attempts targeting similar memory safety flaws in web browsers.