CVE-2026-17937
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 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 flaw in Google Chrome's DevTools implementation that could be exploited by remote attackers to circumvent navigation restrictions through maliciously crafted HTML content. The issue stems from inadequate input validation mechanisms within the DevTools component, which is designed to provide developers with debugging and development tools but inadvertently creates attack vectors when processing untrusted web content. The vulnerability specifically affects Chrome versions prior to 151.0.7922.72, indicating a window of exposure where users were susceptible to navigation bypass attacks that could potentially lead to unauthorized access or data exfiltration.
The technical root cause lies in the insufficient sanitization and validation of user-provided data within DevTools functionality. When Chrome processes HTML content containing crafted inputs, the DevTools component fails to properly validate the incoming data before executing navigation commands. This weakness allows attackers to inject malicious payloads that manipulate DevTools behavior to override normal browser navigation restrictions. The vulnerability operates at the intersection of input validation failure and privilege escalation, where untrusted input can influence the execution flow of trusted development tools. According to CWE classification, this maps to CWE-20, which covers "Improper Input Validation," while the attack pattern aligns with techniques described in ATT&CK framework under T1059.006 for JavaScript-based attacks and T1190 for exploitation of web applications.
The operational impact of this vulnerability extends beyond simple navigation bypass scenarios to potentially enable more sophisticated attacks within the browser environment. Attackers could leverage this weakness to redirect users to malicious sites, inject additional content into web pages, or manipulate DevTools to execute unintended operations that might lead to information disclosure or further compromise of the user's browsing session. The low severity classification from Chromium security team reflects the specific nature of the vulnerability and its limited attack surface, yet it still represents a significant risk given the privileged nature of DevTools functionality and the potential for chaining with other vulnerabilities.
Mitigation strategies should focus on immediate system updates to Chrome version 151.0.7922.72 or later, which includes patches addressing the input validation deficiencies in DevTools. Organizations should also implement network-level monitoring to detect suspicious navigation patterns that might indicate exploitation attempts. Security teams should consider disabling DevTools functionality in restricted environments where such vulnerabilities could be particularly damaging. Additionally, user education regarding the risks of visiting untrusted websites and the importance of keeping browser software updated remains crucial. The fix implemented by Google addresses the core validation issue by strengthening input sanitization within DevTools components and implementing more robust checks for navigation commands originating from untrusted content sources.