CVE-2025-12428 is a type confusion vulnerability found in the V8 JavaScript engine component of Google Chrome prior to version 142.0.7444.59. Type confusion occurs when a program mistakenly treats a piece of memory as a different data type than intended, which can lead to arbitrary code execution or memory corruption. In this case, the vulnerability allows a remote attacker to craft a malicious HTML page that, when loaded by a victim's browser, triggers the flaw in V8. This enables the attacker to perform arbitrary read and write operations within the browser's memory space, potentially leading to full compromise of the browser process. The vulnerability does not require any privileges or prior authentication but does require user interaction, such as visiting a malicious or compromised website. The CVSS v3.1 score of 8.8 reflects the high impact on confidentiality, integrity, and availability, combined with low attack complexity and no privileges required. Although no exploits have been reported in the wild yet, the nature of the vulnerability and the widespread use of Chrome make it a critical issue to address. The vulnerability was publicly disclosed on November 10, 2025, and users are advised to update to version 142.0.7444.59 or later where the issue is fixed.

The vulnerability poses a significant risk to organizations worldwide due to the widespread use of Google Chrome as a primary web browser. Successful exploitation could allow attackers to bypass browser security mechanisms, access sensitive information, manipulate data, or execute arbitrary code within the browser context. This can lead to further compromise of the host system, data theft, or deployment of malware. The impact extends to confidentiality, as attackers can read sensitive data; integrity, as attackers can modify data or browser state; and availability, as exploitation could crash or destabilize the browser. Organizations with employees who frequently browse the internet or access web-based applications are particularly vulnerable. The threat is amplified in environments where Chrome is used to access critical infrastructure or sensitive corporate resources. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks, especially given the high severity rating.

To mitigate this vulnerability, organizations should immediately update all instances of Google Chrome to version 142.0.7444.59 or later, where the issue is patched. Automated patch management solutions can help ensure timely deployment across enterprise environments. Additionally, organizations should implement network-level protections such as web filtering and intrusion prevention systems to block access to known malicious sites. User education is critical to reduce the risk of exploitation via social engineering or phishing that could lure users to malicious pages. Employing browser sandboxing and endpoint detection and response (EDR) solutions can help detect and contain exploitation attempts. Monitoring for unusual browser behavior or crashes may provide early indicators of exploitation. Finally, organizations should maintain an inventory of browser versions in use and enforce policies that prevent the use of outdated software.