CVE-2026-17867 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input in Dawn in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
The vulnerability under discussion represents a critical security flaw in the Dawn graphics library component within Google Chrome browsers prior to version 151.0.7922.72. This issue stems from inadequate input validation mechanisms that fail to properly sanitize untrusted data received from web pages, creating an exploitable pathway for remote attackers to compromise the browser's security boundaries. The Dawn library serves as a crucial component in Chrome's graphics processing pipeline, handling WebGL and other graphics-related operations that require interaction with the underlying system resources.
The technical implementation flaw manifests when the browser processes crafted HTML content that contains maliciously constructed input parameters designed to bypass validation checks within the Dawn graphics subsystem. This vulnerability operates at the intersection of multiple security domains including graphics rendering, memory management, and sandbox isolation mechanisms. The insufficient validation allows an attacker to inject malformed data structures or control sequences that can manipulate the graphics processing pipeline in ways that were not anticipated by the original design. Such input validation failures typically fall under CWE-20, which describes "Improper Input Validation" as a fundamental weakness in software security architecture.
The operational impact of this vulnerability extends beyond simple code execution within the browser context, potentially enabling sandbox escape attacks that allow remote adversaries to break out of the restricted browser environment and gain access to underlying system resources. This type of attack vector represents a significant threat in the adversary tactics framework, aligning with ATT&CK technique T1059 for command and scripting interpreter and T1106 for execution through system commands. The medium severity classification indicates that while the vulnerability requires specific conditions for exploitation, successful exploitation could lead to complete compromise of the affected system.
The attack scenario involves a remote web page containing maliciously crafted HTML elements that trigger the vulnerable code path within Dawn's graphics processing engine. When the browser renders this content, the malformed input bypasses existing security controls and allows the attacker to manipulate memory locations or execution flows that should remain protected by the browser's sandboxing mechanisms. This vulnerability particularly affects systems where Chrome serves as the primary web browsing interface, making it a significant concern for enterprise environments and individual users who rely on web-based applications.
Mitigation strategies for this vulnerability require immediate deployment of Chrome updates to version 151.0.7922.72 or later, which contain patched implementations of input validation controls within the Dawn graphics library. Organizations should also consider implementing additional network-level protections such as content filtering systems and web application firewalls that can detect and block suspicious HTML content before it reaches user browsers. Security monitoring should focus on identifying unusual patterns in browser memory usage or unexpected graphics processing behaviors that might indicate exploitation attempts. The fix typically involves strengthening input validation routines to properly sanitize all data received from untrusted sources, implementing proper bounds checking mechanisms, and ensuring that graphics processing operations maintain strict isolation from system-level resources.
The broader implications of this vulnerability highlight the complexity of modern browser security architectures where components like Dawn must balance performance optimization with robust security controls. This case demonstrates how graphics libraries can become attack surfaces when they fail to properly validate input data, emphasizing the need for comprehensive security testing across all browser subsystems. Security practitioners should recognize that vulnerabilities in specialized components like graphics libraries can have cascading effects on overall system security posture, requiring coordinated patch management and continuous monitoring of emerging threats within browser ecosystems. The incident underscores the importance of maintaining up-to-date software configurations and implementing defense-in-depth strategies that protect against multiple attack vectors simultaneously.