CVE-2026-110914 in Chrome
Summary
by MITRE • 10/16/2026
Memory corruption in Workers in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified involves a memory corruption flaw within the Workers component of Google Chrome, specifically affecting versions prior to 155.0.8059.84. This issue stems from improper handling of memory operations during the execution of web workers, which are background scripts that run independently of the main page script. The root cause is classified under CWE-122, Heap-based Buffer Overflow, where the application writes data beyond the boundaries of a allocated heap buffer due to insufficient bounds checking or incorrect size calculations. This type of memory corruption allows an attacker who crafts a malicious HTML page containing specially constructed JavaScript code targeting the worker execution context to overwrite adjacent memory structures. The severity is rated as Medium by Chromium security standards because, while it enables arbitrary code execution potential, modern browser defenses such as sandboxing and address space layout randomization provide significant mitigation layers that raise the bar for successful exploitation in typical scenarios.
From an operational perspective, this vulnerability poses a critical risk to users browsing untrusted or compromised websites. An attacker can host a crafted HTML page designed to trigger the memory corruption when loaded by a victim using an affected version of Chrome. Upon execution, the malformed data passed to the worker API causes the heap buffer overflow, potentially allowing the injection and execution of arbitrary machine code within the browser process context. Although Google Chrome employs strict sandboxing that isolates renderer processes from the operating system kernel, successful exploitation could still lead to a sandbox escape or allow for further malicious activities such as credential theft, session hijacking, or installation of malware if other vulnerabilities are chained with this initial foothold. The impact is particularly severe in enterprise environments where browser security policies might be less restrictive or where users frequently interact with external web content without adequate awareness of the risks involved.
The exploitation technique aligns with ATT&CK tactic T1059, Command and Scripting Interpreter, specifically through JavaScript execution within a browser environment. The attacker leverages the legitimate functionality of Web Workers to bypass certain security controls that might restrict inline script execution or DOM manipulation in the main thread. By abusing the worker context, the malicious code operates with slightly different privilege boundaries than standard page scripts, potentially evading some content security policies or sandbox restrictions designed for primary document contexts. This highlights a broader challenge in web application architecture where background processing features can introduce attack surfaces if not rigorously validated against memory safety constraints. The vulnerability underscores the importance of robust input validation and safe memory management practices within browser engine components that handle dynamic script execution.
To mitigate this risk, organizations must ensure that all instances of Google Chrome are updated to version 155.0.8059.84 or later immediately upon availability. Automated patching mechanisms should be configured to deploy these updates across all endpoints without delay, as zero-day exploits targeting known vulnerabilities often emerge shortly after public disclosure. Additionally, administrators can enforce strict Content Security Policies that restrict the execution of inline scripts and limit the sources from which web workers are loaded, thereby reducing the likelihood of successful exploitation even if a user visits a malicious site. Implementing browser hardening techniques such as disabling unnecessary features or using enterprise-managed policies to control worker permissions can further reduce the attack surface. Regular security audits and penetration testing focused on memory safety issues in web applications will also help identify similar vulnerabilities before they are exploited by adversaries, ensuring a proactive defense posture against complex cyber threats.