CVE-2026-17674 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in HTML in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass content security policy 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 content security policy bypass in google chrome versions prior to 151.0.7922.72, where an attacker could craft malicious html pages to circumvent browser security mechanisms that are designed to prevent unauthorized content execution and data leakage. The flaw stems from an inadequate implementation of html parsing and security enforcement logic within the browser's rendering engine, allowing malicious actors to exploit gaps in the content security policy framework that should normally restrict script execution, frame loading, and resource access based on predefined security policies.
The technical nature of this vulnerability falls under the category of improper input validation and security enforcement mechanisms, specifically aligning with cwe-16 design flaw classifications where inadequate security controls are implemented within software components. The attack vector involves a remote html page that contains carefully constructed elements or attributes that exploit weaknesses in how chrome processes and enforces content security policies during page rendering. This allows attackers to execute unauthorized code or access restricted resources that should have been blocked by the browser's security model.
The operational impact of this vulnerability is significant as it undermines fundamental web security assumptions that developers and users rely upon when browsing the internet. An attacker could potentially bypass security restrictions that prevent cross-site scripting attacks, frame injection, and data exfiltration attempts that are typically blocked by content security policy directives. This creates a persistent threat vector where malicious websites can perform actions that should be impossible within standard browser security models, potentially leading to session hijacking, credential theft, or further exploitation of user systems through more sophisticated attack chains.
Organizations and users should immediately update to chrome version 151.0.7922.72 or later to remediate this vulnerability, as the bypass allows for unauthorized access that could lead to complete compromise of user sessions and data. Additional mitigations include implementing additional security layers such as browser hardening configurations, network-based content filtering solutions, and monitoring for suspicious content delivery patterns. The vulnerability demonstrates the importance of continuous security auditing and testing of browser security models, particularly focusing on how different security mechanisms interact with each other to ensure proper enforcement. This particular flaw represents a failure in chromium's security architecture that required immediate attention through patching and system updates across all affected platforms.
The incident highlights the critical nature of content security policy implementation within modern browsers and emphasizes the need for comprehensive testing of security controls against adversarial inputs. It also demonstrates how even high-severity vulnerabilities can remain undetected in complex software ecosystems, underscoring the importance of ongoing security research and vulnerability disclosure processes that help identify and remediate such critical flaws before they can be exploited in the wild.