CVE-2026-19169 in Chrome
Summary
by MITRE • 08/07/2026
Insufficient validation of untrusted input in Contextual Tasks in Google Chrome prior to 151.0.7922.109 allowed a remote attacker to perform privilege escalation via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical privilege escalation flaw in Google Chrome's handling of contextual tasks within the browser's architecture. The issue stems from inadequate validation mechanisms that fail to properly sanitize untrusted input originating from web pages, particularly when processing contextual task execution contexts. The vulnerability affects Chrome versions prior to 151.0.7922.109 and has been classified with a high severity rating by the Chromium security team, indicating significant risk to user systems and data integrity.
The technical flaw manifests in how Chrome processes contextual tasks that are initiated through HTML pages, where untrusted input is not sufficiently validated before being processed within privileged execution contexts. This allows malicious actors to craft specially designed HTML content that can bypass normal security boundaries and escalate privileges within the browser environment. The vulnerability operates at the intersection of web content processing and system-level privilege management, creating a pathway for attackers to execute code with elevated permissions.
The operational impact of this vulnerability extends beyond simple browser compromise, as successful exploitation can enable attackers to perform actions that would normally be restricted to privileged processes. This includes accessing sensitive user data, modifying system configurations, or executing arbitrary code with the privileges of the Chrome process itself. The remote nature of the attack vector means that victims need only visit a malicious webpage to be compromised, making this vulnerability particularly dangerous in phishing campaigns and drive-by attack scenarios.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-20, which describes improper input validation, and maps to ATT&CK technique T1059 for command and scripting interpreter usage. The flaw represents a classic privilege escalation vector where untrusted input is processed without adequate sanitization, allowing attackers to manipulate system behavior through carefully crafted web content. Organizations should consider this vulnerability in their threat modeling exercises, particularly when evaluating browser-based attack surfaces and implementing security controls.
Mitigation strategies should prioritize immediate patching of affected Chrome versions to 151.0.7922.109 or later, as this resolves the underlying validation issues in contextual task processing. Network administrators should also consider implementing additional security measures such as content filtering solutions, browser hardening configurations, and monitoring for suspicious web traffic patterns that might indicate exploitation attempts. Regular security assessments of browser configurations and user access controls should be conducted to minimize the attack surface and reduce the likelihood of successful privilege escalation through similar vulnerabilities.