CVE-2026-17710 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in MHTML in Google Chrome on Mac prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical sandbox escape flaw in Google Chrome's handling of MHTML content on macOS systems. The issue stems from an inappropriate implementation within Chrome's MHTML processing mechanism that fails to properly validate or isolate potentially malicious content. When a renderer process is compromised, an attacker can leverage this weakness to break out of the restricted browser sandbox environment and gain elevated privileges. The vulnerability specifically affects versions prior to 151.0.7922.72, indicating a targeted security gap in Chrome's architecture that was introduced before this patch version.
The technical execution of this attack involves crafting a malicious HTML page that exploits the MHTML processing code path within Chrome's renderer component. Once executed, the compromised renderer process can manipulate memory or system calls to bypass the sandbox restrictions that normally isolate browser processes from the underlying operating system. This represents a sophisticated attack vector where the initial compromise is leveraged to achieve privilege escalation through improper input validation. The vulnerability demonstrates a failure in Chrome's security model where content handling routines do not adequately enforce the boundaries between trusted and untrusted code execution contexts.
From an operational impact perspective, this vulnerability poses significant risk to macOS users as it allows remote attackers to potentially execute arbitrary code with elevated privileges after compromising a single browser renderer process. The sandbox escape capability means that what might initially appear as a limited browser exploit could result in full system compromise. Security professionals must consider the implications for enterprise environments where Chrome is widely deployed, as this vulnerability could enable attackers to establish persistent access or escalate privileges without requiring additional attack vectors. The high severity classification reflects the potential for complete system compromise when exploited.
Mitigation strategies should focus on immediate patch deployment to versions 151.0.7922.72 and later, which contain the necessary code fixes for proper MHTML content handling. Organizations should also implement network monitoring to detect suspicious HTML content delivery patterns and consider browser hardening measures such as disabling unnecessary features or implementing additional security policies. The vulnerability aligns with ATT&CK technique T1059.007 for command and script interpreter execution, while also mapping to CWE-248 for an exception that is not caught. Security teams should monitor for indicators of compromise related to unusual renderer process behavior and implement comprehensive vulnerability management processes to address similar implementation flaws in browser security models.