CVE-2026-17931 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation 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 significant bypass of Chrome's security controls within the Developer Tools component, specifically affecting versions prior to 151.0.7922.72. The flaw stems from inadequate validation mechanisms that fail to properly enforce navigation restrictions when DevTools is active, creating a potential attack vector for remote adversaries. The issue manifests when a malicious actor crafts a specially designed HTML page that exploits the improper implementation of security boundaries within the browser's developer interface.
The technical root cause lies in the insufficient sanitization and verification processes that govern how DevTools handles navigation requests and restrictions. When Chrome's Developer Tools component processes user-generated content, it fails to adequately validate the legitimacy of navigation attempts, allowing crafted payloads to circumvent established security boundaries. This improper implementation creates a pathway where attackers can manipulate the browser's navigation behavior through malicious HTML constructs, effectively bypassing the intended protection mechanisms that should prevent unauthorized access or navigation.
From an operational perspective, this vulnerability poses a moderate risk to users who may inadvertently encounter malicious web content while having DevTools open or when browsing untrusted websites. The low severity classification indicates that exploitation typically requires specific conditions and user interaction, but the potential impact extends beyond simple navigation bypasses. Attackers could potentially leverage this weakness to escalate privileges, access restricted resources, or redirect users to malicious domains while maintaining a level of stealth due to the legitimate nature of DevTools functionality.
The vulnerability aligns with CWE-284, which addresses improper access control mechanisms, and demonstrates how developer tool implementations can inadvertently create security gaps in browser architectures. From an ATT&CK framework perspective, this weakness maps to T1059.001 for command and script interpreter execution and potentially T1566 for social engineering techniques that could exploit user trust in legitimate development tools. Organizations should prioritize patch management to ensure all Chrome installations are updated to version 151.0.7922.72 or later, where the navigation restriction bypass has been addressed through improved validation of DevTools component interactions.
Mitigation strategies should include comprehensive browser update policies, regular security assessments of development environments, and user education about the risks associated with running DevTools alongside untrusted content. Security teams should also consider implementing network-level controls to monitor for suspicious navigation patterns and establish baseline configurations that minimize the attack surface when DevTools functionality is active. The remediation process requires careful testing to ensure that security updates do not disrupt legitimate development workflows while effectively closing the identified vulnerability pathway.
This incident highlights the critical importance of maintaining robust security controls even within seemingly benign browser components, as developer tools often operate with elevated privileges and access to sensitive system resources. The vulnerability demonstrates how complex software architectures can contain subtle implementation flaws that create exploitable conditions, emphasizing the need for continuous security auditing and validation of all browser functionality, particularly those components that interface with user-generated content and system-level operations.