CVE-2026-17816 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient policy enforcement in Speech in Google Chrome on Android prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to perform privilege escalation via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical weakness in Google Chrome's security architecture on Android platforms, specifically affecting versions prior to 151.0.7922.72. The flaw stems from insufficient policy enforcement mechanisms that govern how the browser handles speech-related functionalities, creating a pathway for privilege escalation when an attacker has already compromised the renderer process. The vulnerability operates under the principle of least privilege violation where the speech processing components fail to properly validate or restrict access controls, allowing malicious code execution with elevated privileges.
The technical implementation of this vulnerability leverages the compromised renderer process as a foothold to exploit design flaws in Chrome's speech handling subsystem. When a crafted HTML page is loaded, it can trigger specific speech APIs that bypass normal security boundaries, enabling unauthorized access to system resources or capabilities typically restricted to privileged processes. This represents a classic case of privilege escalation through process compromise, where the initial breach is amplified by inadequate sandboxing controls around speech-related functionality.
From an operational perspective, this vulnerability poses significant risk to Android users who may encounter malicious websites or phishing pages that exploit the speech API misconfigurations. The medium severity classification reflects the requirement for a pre-existing compromised renderer process, which suggests that attackers would need to first achieve initial access through other vectors such as drive-by downloads or social engineering attacks. However, once achieved, the privilege escalation capability could enable full system compromise, making this vulnerability particularly dangerous in targeted attack scenarios.
The security implications extend beyond simple code execution to encompass potential data exfiltration, system monitoring, and persistent access capabilities. Attackers could leverage this vulnerability to access sensitive user information, monitor system activities, or establish backdoors that persist across device reboots. This aligns with ATT&CK framework techniques related to privilege escalation and persistence mechanisms, where the vulnerability serves as an attack vector for establishing long-term system control.
Mitigation strategies should prioritize immediate patching of affected Chrome versions to 151.0.7922.72 or later, which includes enhanced policy enforcement controls around speech processing components. Organizations should also implement network-level protections such as content filtering and web application firewalls to prevent access to known malicious domains. Additionally, users should maintain awareness of phishing attempts and avoid visiting untrusted websites, particularly those that may attempt to exploit browser vulnerabilities through crafted HTML content. The remediation aligns with CWE categories related to insufficient policy enforcement and privilege escalation, emphasizing the importance of proper access control implementation in browser security architectures.