CVE-2026-15132 in Chrome
Summary
by MITRE • 07/09/2026
Uninitialized Use in V8 in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox 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 uninitialized memory access flaw in the V8 JavaScript engine used by Google Chrome prior to version 150.0.7871.115. The issue stems from improper memory management where variables or objects are accessed before being properly initialized, creating a potential attack vector for remote code execution within the browser's sandbox environment. The vulnerability falls under the CWE-457 category of use of uninitialized variable, which is classified as a high-severity issue due to its potential for arbitrary code execution.
The technical exploitation occurs when a malicious HTML page triggers specific conditions that cause V8 to reference uninitialized memory locations during JavaScript execution. This uninitialized use creates a memory access pattern that can be manipulated by attackers to overwrite critical memory regions or execute crafted payloads through the browser's sandbox isolation mechanisms. The Chromium security severity classification of High indicates that this vulnerability can be leveraged remotely without user interaction, making it particularly dangerous for widespread exploitation.
The operational impact of this vulnerability extends beyond simple code execution as it specifically targets the browser's sandbox environment, which is designed to isolate potentially malicious content from the underlying operating system. When an attacker successfully exploits this uninitialized use flaw, they can bypass sandbox protections and gain elevated privileges within the browser context. This creates a significant risk for users who may encounter malicious web content while browsing, particularly in scenarios where the browser is not updated with the latest security patches.
Mitigation strategies should prioritize immediate patching of Chrome installations to version 150.0.7871.115 or later, as this addresses the root cause through proper memory initialization checks and validation. Organizations should implement comprehensive browser update policies and consider deploying additional security layers such as content security policies, sandboxing configurations, and web application firewalls. The vulnerability demonstrates the importance of memory safety in JavaScript engines and aligns with ATT&CK techniques related to exploit development and privilege escalation through browser-based attacks. Security teams should also monitor for indicators of compromise related to this specific vulnerability and ensure that automated patch management systems are configured to address such critical security updates promptly.