CVE-2026-15770 in Chrome
Summary
by MITRE • 07/15/2026
Uninitialized Use in V8 in Google Chrome prior to 150.0.7871.125 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents an uninitialized variable flaw in the V8 JavaScript engine used by Google Chrome, specifically affecting versions prior to 150.0.7871.125. The issue falls under the Common Weakness Enumeration category of CWE-457 which describes use of uninitialized variables, a fundamental security concern that can lead to information disclosure and potential exploitation. The vulnerability occurs when the V8 engine fails to properly initialize certain memory locations before using them, creating opportunities for attackers to extract sensitive data from process memory through carefully crafted HTML content.
The technical execution of this attack involves an attacker constructing a malicious HTML page that triggers specific code paths within the V8 engine where uninitialized variables are accessed. When Chrome processes such malformed content, the uninitialized memory values contain leftover data from previous operations, potentially including sensitive information such as cryptographic keys, passwords, session tokens, or other confidential data that was previously stored in those memory locations. This type of information disclosure vulnerability enables attackers to perform reconnaissance and gather intelligence that could be leveraged for more sophisticated attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with a foothold for further exploitation within the target system. The High severity classification by Chromium security team indicates the potential for significant damage given that attackers can potentially extract sensitive data without requiring elevated privileges or complex attack vectors. This flaw particularly affects web-based environments where users may inadvertently encounter malicious content through phishing campaigns, compromised websites, or drive-by downloads, making it a critical concern for enterprise security teams managing browser-based attack surfaces.
Mitigation strategies should focus on immediate patching of affected Chrome versions to the latest stable release, as Google has addressed this vulnerability in version 150.0.7871.125 and later. Organizations should also implement browser hardening measures including sandboxing configurations, content security policies, and regular security updates to minimize exposure windows. Network-level protections such as web application firewalls and intrusion detection systems can help identify and block malicious HTML content attempts. Additionally, security awareness training for end users remains crucial in preventing accidental exposure to crafted malicious pages that exploit this uninitialized variable vulnerability within the V8 engine's memory management processes.