CVE-2026-87592 in Chrome
Summary
by MITRE • 09/09/2026
Out of bounds read in Tint in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified as an out-of-bounds read within the Tint component of Google Chrome prior to version 153.0.8010.36 represents a critical memory safety flaw that undermines the browser's sandboxing mechanisms. This specific defect occurs when the application attempts to access data at a memory location that lies outside the intended buffer boundaries, resulting in the reading of arbitrary memory contents rather than causing an immediate crash or denial of service. The Tint component is integral to Chrome's rendering and processing pipeline, handling complex computational tasks related to graphics and layout calculations. When this logic processes malformed input derived from a crafted HTML page, it fails to properly validate array indices or pointer arithmetic before execution, allowing the program counter to traverse into adjacent memory regions that are typically protected by sandbox boundaries.
From a technical perspective, this flaw aligns with CWE-125, which defines out-of-bounds read vulnerabilities where software reads data past the end of a buffer. In the context of modern web browsers, such errors are particularly dangerous because they can be triggered remotely through standard web interactions without requiring user interaction beyond visiting a malicious site. The attacker crafts an HTML page containing specific JavaScript or embedded content that exploits the logic error in Tint to force the browser engine to read memory locations it should not access. This capability effectively bypasses the isolation provided by Chrome's sandbox, which is designed to restrict untrusted web content from accessing sensitive system resources and user data. By leveraging this vulnerability, a remote attacker can potentially exfiltrate information stored in adjacent memory spaces, including cryptographic keys, session tokens, or other private data belonging to the victim.
The operational impact of this vulnerability extends beyond simple data leakage. While classified with low severity by Chromium security teams due to the complexity required for reliable exploitation and the mitigations present in modern browsers like ASLR and DEP, it still poses a significant risk. Successful exploitation could lead to information disclosure that aids further attacks or compromises user privacy on an industrial scale. Furthermore, out-of-bounds reads are often precursors to more severe vulnerabilities such as use-after-free conditions or arbitrary code execution if the leaked memory addresses allow for precise control over subsequent operations. The ability to read sandboxed memory effectively weakens the defense-in-depth strategy employed by Google Chrome, making it a target for sophisticated threat actors seeking initial access vectors in enterprise environments where browser security is paramount.
To mitigate this risk, organizations and individual users must ensure that their browsers are updated to version 153.0.8010.36 or later immediately upon availability. This update contains the necessary patches that enforce stricter bounds checking within the Tint component, preventing the invalid memory access from occurring in the first place. Additionally, security administrators should monitor for indicators of compromise related to unusual network traffic patterns originating from browser processes, which may signal attempted exploitation attempts. Implementing application whitelisting and restricting script execution on untrusted sites can provide an additional layer of defense against such remote code execution or data exfiltration attacks. Regular patch management cycles are essential to address these types of memory safety issues promptly before they can be weaponized in the wild, maintaining the integrity of the browsing environment and protecting sensitive user information from unauthorized access.