CVE-2026-15125 in Chrome
Summary
by MITRE • 07/09/2026
Inappropriate implementation in Forms 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 sandbox escape flaw in Google Chrome's form handling mechanism that existed prior to version 150.0.7871.115. The issue stems from an inadequate implementation of form processing components within the browser's security architecture, creating a pathway for remote code execution attacks. The vulnerability specifically targets the form rendering and validation systems that operate within Chrome's sandboxed environment, which is designed to isolate potentially malicious content from the underlying operating system. Attackers could craft specially malformed HTML pages containing malicious form elements that would trigger unexpected behavior in Chrome's form processing pipeline, ultimately allowing arbitrary code execution within the sandbox boundaries.
The technical nature of this vulnerability aligns with CWE-787, which describes out-of-bounds writes in the context of web browser security, and potentially CWE-121, concerning stack-based buffer overflows that could occur during form element processing. The flaw likely manifests through improper input validation or memory management when Chrome processes complex form structures, particularly those involving nested elements, dynamic content generation, or unconventional attribute combinations. Attackers would exploit this by constructing HTML pages that manipulate form elements in ways that exceed normal processing boundaries, potentially triggering memory corruption or control flow manipulation within the browser's rendering engine.
The operational impact of this vulnerability is severe as it directly undermines Chrome's core security model and sandboxing architecture. Successful exploitation would allow attackers to bypass the isolation mechanisms designed to protect users from malicious web content, potentially enabling full system compromise or data exfiltration. This vulnerability affects all users running Chrome versions before 150.0.7871.115, making it particularly dangerous given Chrome's widespread adoption across enterprise and consumer environments. The remote nature of the attack means that simply visiting a compromised website could trigger exploitation, eliminating the need for user interaction beyond normal browsing behavior.
From an attacker perspective, this vulnerability maps to several ATT&CK techniques including T1059.001 for command and script interpreter execution, T1203 for exploitation for privilege escalation, and T1071.001 for application layer protocol usage. The attack chain would typically involve hosting malicious HTML content on a compromised server or leveraging phishing campaigns to deliver the exploit payload. Security organizations should prioritize immediate patching of affected Chrome installations and implement network monitoring to detect potential exploitation attempts. Additional mitigations include deploying web application firewalls, implementing strict content security policies, and maintaining awareness of emerging threats targeting browser sandbox mechanisms.
The vulnerability demonstrates the ongoing challenges in securing complex browser environments where multiple rendering engines and security layers must interoperate seamlessly. Browser vendors increasingly rely on sophisticated sandboxing techniques to isolate potentially malicious content, but these systems remain vulnerable to subtle implementation flaws that can be exploited by determined attackers. This incident underscores the importance of continuous security auditing, automated vulnerability scanning, and rapid patch deployment processes within enterprise security frameworks. Organizations should also consider implementing browser hardening measures such as disabling unnecessary form processing features, restricting third-party plugin execution, and maintaining regular security assessments of their browser-based applications and services.
The remediation strategy centers on immediate deployment of Chrome version 150.0.7871.115 or later, which contains the necessary patches to address the sandbox escape vulnerability. Security teams should also implement comprehensive monitoring solutions capable of detecting anomalous form processing behavior that might indicate exploitation attempts. Regular security updates and patch management protocols should be enforced across all browser installations to prevent similar vulnerabilities from being exploited in the future. Organizations may also benefit from implementing additional layers of defense including network segmentation, web filtering solutions, and user education programs focused on recognizing potentially malicious web content.