CVE-2026-15130 in Chrome
Summary
by MITRE • 07/09/2026
Insufficient policy enforcement in Navigation in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/09/2026
This vulnerability represents a critical failure in chrome's site isolation mechanisms that could allow remote attackers to bypass essential security protections through carefully crafted html content. The flaw exists within the navigation handling system of google chrome browsers version 150.0.7871.114 and earlier, where insufficient policy enforcement permits malicious actors to circumvent the browser's fundamental security boundary controls. The vulnerability specifically impacts chrome's site isolation architecture which is designed to prevent cross-site scripting attacks by running each website in a separate process. When exploited, this weakness allows attackers to execute code across different origins that should normally be isolated from each other, effectively breaking down the browser's core security model.
The technical implementation of this vulnerability stems from inadequate validation within chrome's navigation processing pipeline where the browser fails to properly enforce site isolation policies when handling specific html page constructions. This flaw enables an attacker to craft malicious web content that can manipulate the browser's process management and memory boundaries, allowing code execution across different security contexts. The issue manifests when chrome processes navigation requests without sufficient verification of the originating site's isolation status, creating a pathway for cross-site contamination. Attackers can leverage this by hosting malicious content on one domain that, when navigated to through specific html elements or javascript calls, triggers the vulnerable code path in chrome's navigation engine.
The operational impact of this vulnerability is severe as it directly undermines the fundamental security assumptions upon which modern web browsers operate. Successful exploitation allows attackers to bypass critical security controls that protect users from malicious websites and cross-site attacks. This could enable a range of malicious activities including credential theft, data exfiltration, and privilege escalation within the browser environment. The high severity classification reflects the potential for remote code execution and the fact that exploitation requires no user interaction beyond visiting a malicious website. This vulnerability particularly affects enterprise users and organizations that rely on chrome's security model for protecting sensitive information, as it could allow attackers to move laterally between different websites and potentially access confidential data.
Mitigation strategies should focus on immediate browser updates to version 150.0.7871.115 or later where the vulnerability has been patched. Organizations should implement additional network-level protections including web application firewalls and content filtering systems that can detect and block known malicious navigation patterns. Security teams should also consider implementing browser hardening measures such as disabling unnecessary javascript features and restricting access to potentially dangerous html elements. The fix implemented by google addresses the specific policy enforcement gaps in chrome's navigation handling system, ensuring that site isolation rules are properly enforced during all navigation operations. This vulnerability aligns with CWE-693 weakness category related to protection mechanism failures and maps to attack techniques in the ATT&CK framework under privilege escalation and defense evasion tactics where attackers exploit browser security flaws to gain unauthorized access to system resources.