CVE-2026-106250 in Chrome
Summary
by MITRE • 10/06/2026
Missing authorization in Actor in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to bypass system access restrictions 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 missing authorization within the actor component of Google Chrome, specifically affecting versions prior to 155.0.8059.39, represents a critical failure in access control mechanisms that governs how user interactions are processed and validated by the browser engine. This flaw allows for unauthorized actions to be executed under the context of the current user without proper verification of permissions or intent. The severity is classified as low within the Chromium security framework, indicating that while the issue is valid and requires remediation, it does not inherently provide a direct path to arbitrary code execution or complete system compromise without additional exploitation steps. However, even low-severity vulnerabilities in widely deployed software like Chrome can have significant implications when combined with other attack vectors or specific user behaviors.
The technical nature of this flaw centers on the actor model implementation within Chromium's architecture, where actors handle various asynchronous tasks and message passing between different components of the browser. In this instance, the system failed to enforce strict authorization checks before allowing an actor to perform certain operations that should be restricted based on the origin or context of the request. This lack of validation means that if a malicious web page can trigger specific interactions with these actors, it may bypass intended security boundaries designed to isolate untrusted content from sensitive browser functions or system resources. The vulnerability does not stem from a memory corruption error but rather from logical errors in permission handling logic within the JavaScript engine or related subsystems responsible for managing user interface elements and their associated behaviors.
Operationally, this vulnerability enables remote attackers to leverage social engineering techniques to exploit the missing authorization checks. By crafting an HTML page that contains malicious scripts designed to interact with vulnerable browser components, an attacker can trick a victim into performing actions they did not intend or authorize. For example, such a crafted page might attempt to trigger notifications, modify settings, or access data in ways that should require explicit user consent or higher privilege levels. The success of this attack relies heavily on the victim's interaction with the malicious content, making it dependent on human factors rather than purely technical exploitation chains. This highlights the importance of secure coding practices that prioritize defense-in-depth strategies to mitigate risks arising from logical flaws even when memory safety is not directly compromised.
From a standards perspective, this vulnerability aligns closely with CWE-284, which describes Improper Access Control, specifically where access control permissions are not properly enforced for certain operations or resources. It also relates to ATT&CK technique T1059, Command and Scripting Interpreter, as the exploitation involves executing scripts within the browser environment to achieve unauthorized outcomes. The use of social engineering further connects it to tactics involving user manipulation, emphasizing that technical controls must be complemented by awareness training and robust security policies to prevent successful exploitation in real-world scenarios.
Mitigation strategies for this vulnerability primarily involve updating Google Chrome to version 155.0.8059.39 or later, where the authorization checks have been corrected to ensure proper validation of actor permissions before executing sensitive operations. Administrators should enforce automatic update policies across all endpoints to minimize exposure windows. Additionally, organizations can implement browser security configurations that restrict script execution from untrusted origins and disable unnecessary features such as notifications or pop-ups for non-essential sites. User education remains crucial in this context, as employees must be trained to recognize suspicious links and avoid interacting with unexpected prompts or content generated by web pages they do not trust. Regular audits of installed extensions and plugins can also reduce the attack surface, ensuring that only verified components interact with browser internals.