CVE-2026-19559 in Chrome
Summary
by MITRE • 08/12/2026
Use after free in HTML in Google Chrome prior to 151.0.7922.137 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 • 08/12/2026
This vulnerability represents a critical use-after-free condition in the html parsing and rendering components of google chrome browser prior to version 151.0.7922.137. The flaw occurs within the browser's sandboxed environment where memory management errors can lead to remote code execution. A remote attacker could craft a malicious html page that triggers this use-after-free condition during normal web page rendering operations, allowing arbitrary code execution within the restricted browser sandbox. The vulnerability stems from improper handling of memory allocation and deallocation in the html processing pipeline where objects are freed from memory but references to them persist, creating opportunities for memory corruption attacks.
The technical nature of this vulnerability aligns with common software security flaws categorized under cwe-416 use after free and cwe-125 out-of-bounds read. The attack vector exploits the browser's html parsing engine where crafted malicious content can cause the memory management system to release objects while maintaining references to them, potentially allowing attackers to manipulate freed memory regions. This type of vulnerability is particularly dangerous in modern browsers due to the complex memory management systems and sandboxing mechanisms that separate different processes and components within the browser architecture. The chromium security severity classification as high reflects the potential for privilege escalation and remote code execution within the browser environment.
When exploited, this vulnerability allows attackers to bypass the browser's security model and execute arbitrary code with the privileges of the browser process. The impact extends beyond simple script execution to potentially compromise user data, enable persistent backdoors, or serve as a stepping stone for further attacks against the underlying operating system. The sandboxed nature of chrome means that while the initial exploitation occurs within the browser's restricted environment, successful exploitation could potentially lead to broader system compromises through privilege escalation techniques. This vulnerability demonstrates how memory corruption issues in complex software systems can create severe security implications even when operating within controlled execution environments.
Mitigation strategies include immediate updating of google chrome browsers to version 151.0.7922.137 or later, which contains patches addressing the specific memory management issues causing the use-after-free condition. Organizations should implement network-based protections such as web application firewalls and content filtering systems to block access to known malicious domains that might host exploit code. Browser hardening techniques including disabling unnecessary plugins, implementing strict content security policies, and using browser isolation technologies can provide additional layers of protection. Security monitoring should focus on detecting anomalous browser behavior patterns that might indicate exploitation attempts, particularly around memory allocation and deallocation events within web rendering processes. The exploitability of this vulnerability makes it essential for organizations to maintain up-to-date browser versions as part of their overall security posture and incident response planning.