CVE-2026-106269 in Chrome
Summary
by MITRE • 10/06/2026
Use after free in CSS in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6794 represents a critical memory safety flaw within the Cascading Style Sheets engine of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This issue is classified as an out-of-bounds write or use-after-free condition that occurs during the processing of CSS properties by the browser's rendering pipeline. The root cause lies in a failure to properly manage memory allocation and deallocation cycles when handling complex style rules, leading to a scenario where the application attempts to access memory regions that have already been freed by the garbage collector or explicit cleanup routines. This type of error is particularly dangerous because it can result in arbitrary code execution if an attacker can control the data written into the dangling pointer before the memory is reallocated for another purpose.
From a technical perspective, this vulnerability falls under the Common Weakness Enumeration category CWE-416, which describes use after free errors. In the context of web browsers, such flaws are often exploited through crafted HTML pages that trigger specific CSS parsing paths within Chromium's Blink engine. When the browser processes these maliciously constructed stylesheets, it may retain a reference to an object or memory block that has been invalidated. Subsequent operations on this stale reference allow for unauthorized reads or writes to adjacent memory structures. The severity of this flaw is rated as low by the Chromium security team, likely due to existing mitigations such as sandboxing and heap hardening techniques like ASLR (Address Space Layout Randomization) and DEP (Data Execution Prevention), which raise the difficulty level required for a successful exploitation chain.
The operational impact of this vulnerability is significant despite its low severity rating because it allows remote code execution within the browser's restricted environment. An attacker can host a malicious webpage containing specially crafted HTML and CSS that, when visited by an unsuspecting user, triggers the use-after-free condition. If exploited successfully, this could lead to the compromise of the renderer process sandbox, potentially allowing the attacker to escape the isolated context and execute arbitrary commands on the underlying operating system. This undermines the fundamental security model of modern web browsers, which rely heavily on strict isolation between untrusted web content and sensitive user data or system resources.
To mitigate this risk, users must ensure that their Google Chrome installation is updated to version 155.0.8059.39 or later, where these memory management issues have been addressed through code patches that enforce stricter pointer validation and proper lifecycle management for CSS objects. Security administrators should also consider implementing browser policies that restrict the execution of untrusted scripts and disable unnecessary features such as JavaScript if not required by business operations. Furthermore, deploying endpoint detection and response solutions can help identify anomalous behavior indicative of exploitation attempts, providing an additional layer of defense against zero-day attacks targeting memory corruption vulnerabilities in web browsers.