CVE-2026-18015 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Tint in Google Chrome on Mac prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 07/30/2026
The vulnerability in question involves an inappropriate implementation within the Tint component of Google Chrome on macOS systems prior to version 151.0.7922.72, representing a sandbox escape opportunity that could be exploited by remote attackers. This flaw resides in how Chrome handles certain HTML page elements and interactions with the underlying operating system, creating a potential pathway for privilege escalation beyond the intended browser sandbox boundaries. The vulnerability demonstrates a critical weakness in the isolation mechanisms that separate browser processes from the host operating system, particularly affecting macOS environments where the Tint component manages windowing and rendering operations.
The technical implementation flaw stems from insufficient validation and sanitization of crafted HTML content that triggers unexpected behavior within Chrome's sandboxed environment. When processing maliciously constructed web pages, the Tint component fails to properly enforce security boundaries, allowing potentially untrusted code execution that could bypass the standard isolation protocols. This vulnerability operates at a low severity level according to Chromium's classification system but represents a significant risk due to its potential for privilege escalation and sandbox circumvention. The flaw specifically affects macOS implementations where Chrome's rendering pipeline interacts with the native windowing system through Tint, creating an attack surface that adversaries can leverage to execute arbitrary code with elevated privileges.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass broader security implications within the Chrome ecosystem and potentially the entire macOS environment. Attackers could craft HTML pages that exploit this weakness to escape the browser sandbox and gain access to system resources, files, and processes that should remain isolated from web content. This capability undermines fundamental security assumptions about browser isolation and could enable more sophisticated attacks including data exfiltration, system compromise, or further exploitation of other vulnerabilities within the operating system. The low severity rating does not diminish its potential impact as it represents a fundamental breakdown in Chrome's security architecture that could be chained with other exploits to achieve more significant objectives.
Mitigation strategies for this vulnerability focus primarily on immediate software updates to the affected Chrome versions, ensuring all users upgrade to 151.0.7922.72 or later releases where the sandbox escape mechanism has been addressed. Organizations should implement comprehensive patch management procedures to quickly deploy these security updates across all affected systems. Additionally, network administrators can consider implementing web filtering solutions that block access to known malicious domains and content that might contain crafted HTML pages designed to exploit this vulnerability. Security monitoring should be enhanced to detect unusual browser behavior patterns that might indicate exploitation attempts, particularly around sandbox violation indicators. This vulnerability aligns with CWE-242, which addresses "Use of Insecure Functions" in software design, and represents a specific instance where improper implementation of system interactions creates security boundaries that can be circumvented through carefully crafted user input. The ATT&CK framework categorizes this under privilege escalation techniques, specifically targeting the sandbox escape capability as part of a broader attack chain that could lead to complete system compromise.