CVE-2026-15126 in Chrome
Summary
by MITRE • 07/09/2026
Use after free 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 use-after-free condition in the forms handling component of Google Chrome browser prior to version 150.0.7871.115, classified as a chromium security severity high risk issue. The flaw occurs within the browser's sandboxed environment where memory management errors can potentially be exploited by remote attackers to achieve arbitrary code execution. Such vulnerabilities typically arise when software continues to reference memory locations after they have been freed, creating opportunities for malicious actors to manipulate program flow through carefully crafted input.
The technical implementation of this vulnerability involves the improper handling of form elements within the browser's rendering engine where memory allocated for form objects becomes accessible after deallocation. This memory corruption scenario allows attackers to control the execution flow of the application by overwriting critical data structures or function pointers. The attack vector requires a remote attacker to craft a malicious HTML page that triggers the specific code path leading to the use-after-free condition, which then enables privilege escalation within the sandboxed browser environment.
From an operational impact perspective, this vulnerability poses significant risks to user security as it allows remote code execution without requiring user interaction beyond visiting a malicious webpage. The sandbox isolation typically protects users from such attacks, but this flaw effectively bypasses those protections by exploiting memory management errors that occur within the browser's form processing subsystem. The severity classification indicates that exploitation is likely possible with relatively simple attack vectors and could result in complete system compromise.
The vulnerability aligns with common weakness enumerations such as CWE-416 which specifically addresses use-after-free conditions, and maps to ATT&CK techniques involving privilege escalation and code injection within browser environments. Organizations should prioritize immediate patching of affected Chrome versions to prevent exploitation while implementing network-based protections such as web application firewalls that can detect and block malicious HTML content targeting these specific memory corruption patterns.
Mitigation strategies include deploying the patched Chrome version 150.0.7871.115 or later which contains fixes for the memory management issues in form handling components, along with implementing browser hardening measures such as disabling unnecessary plugins and maintaining strict content security policies. Security teams should monitor for indicators of compromise related to malicious web pages exploiting this vulnerability and consider network segmentation to limit potential lateral movement if exploitation occurs. Additionally, regular security assessments of browser configurations and user training on recognizing potentially malicious websites can provide additional defense layers against such attacks that rely on social engineering aspects of web browsing.