CVE-2026-17926
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input in DevTools in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass navigation restrictions via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical oversight in chrome's devtools implementation that could be exploited through carefully crafted html pages to circumvent navigation restrictions. The flaw stems from inadequate validation of untrusted input within the developer tools framework, specifically when processing user interactions and UI gestures. Attackers could potentially manipulate the browser's navigation behavior by constructing malicious web content that triggers specific sequences of user interface actions. The vulnerability operates at the intersection of browser security boundaries where devtools functionality intersects with regular web page execution contexts. This type of flaw typically falls under cwes such as 20 - Improper Input Validation or 749 - Exposed Dangerous Method or Function, representing a failure to properly sanitize inputs that could influence core browser operations.
The exploitation scenario involves convincing a victim to interact with a maliciously crafted webpage that contains specific html elements designed to trigger particular ui gestures within chrome's devtools environment. These gestures, when executed in the context of untrusted content, can bypass normal navigation restrictions that would otherwise prevent certain types of page transitions or resource access. The attack requires user interaction through specific UI gestures rather than purely automated exploitation, making it a targeted social engineering vector. This approach leverages the trust relationship between chrome's developer tools and the browser environment to extend the scope of what untrusted code can accomplish.
The operational impact extends beyond simple navigation bypass as it potentially allows attackers to access restricted resources or perform actions that would normally be prevented by chrome's security model. This could enable information disclosure through access to internal chrome resources, or provide a foothold for more sophisticated attacks that build upon the initial bypass. The low chromium security severity rating reflects that the vulnerability requires user interaction and specific conditions to be exploited successfully. However, the potential for chaining this with other vulnerabilities or using it as a stepping stone remains significant in threat actor attack matrices.
Mitigation strategies should focus on strengthening input validation within devtools components and implementing additional sandboxing measures between devtools functionality and regular page execution contexts. Browser vendors should consider enhancing privilege separation mechanisms to prevent untrusted content from influencing core navigation behaviors. Users should be educated about the risks of interacting with untrusted web content, particularly when devtools are active. Organizations implementing chrome-based security controls should monitor for exploitation attempts and consider disabling devtools in restricted environments where possible. This vulnerability demonstrates the importance of maintaining strict input validation even in developer-facing components that may not be directly exposed to end users, aligning with defense-in-depth principles from both cwe categorization and attack framework considerations.