CVE-2026-79087 in Chrome
Summary
by MITRE • 08/26/2026
Injection in Chrome Tabs in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an injection flaw within the tab management subsystem of Google Chrome, specifically affecting versions prior to 152.0.7977.65, represents a significant breach in browser isolation mechanisms. This issue stems from improper validation or sanitization processes when handling data passed between different security contexts within the browser architecture. In modern web browsers like Chrome, strict separation of privileges is enforced through sandboxing and origin-based policies to prevent malicious content from accessing sensitive system resources or user data. However, this specific injection vulnerability allows a remote attacker to exploit weaknesses in how tab states and navigation events are processed, potentially circumventing these critical access restrictions. The severity rating of Medium by the Chromium security team reflects that while exploitation requires careful crafting, it does not necessarily require local code execution privileges on the victim's machine, relying instead on social engineering or drive-by download tactics via a malicious web page.
From a technical perspective, this flaw likely involves improper handling of input data within the tab interface logic, where user-controlled content is injected into command strings or state variables without adequate escaping. This can lead to unintended execution of commands or manipulation of browser behavior that violates the same-origin policy. The attacker crafts an HTML page containing specific payloads designed to trigger these injection points during tab creation, switching, or navigation events. By exploiting this flaw, a malicious actor could potentially access restricted APIs, read sensitive cookies from other origins, or manipulate the browsing context in ways that bypass standard security controls. This type of vulnerability is particularly dangerous because it operates within the trusted environment of the browser itself, making detection by traditional perimeter defenses difficult without deep packet inspection or behavioral analysis tools.
The operational impact of this vulnerability extends beyond simple data theft. If successfully exploited, an attacker could establish a persistent foothold on the victim's system through further exploitation chains that leverage the elevated privileges gained from bypassing tab access restrictions. This could lead to unauthorized modification of browser settings, installation of malicious extensions, or redirection to phishing sites with higher credibility due to the apparent legitimacy of the compromised session. Users relying on Chrome for secure communications, financial transactions, or corporate data handling are at significant risk if they remain on affected versions. The ability to bypass system access restrictions undermines the fundamental trust model of web browsing, where users expect that visiting a malicious site will not compromise their entire computing environment.
To mitigate this risk, organizations and individual users must ensure that Google Chrome is updated to version 152.0.7977.65 or later immediately upon availability. This update contains the necessary patches for the underlying injection flaws in the tab management subsystem. In environments where automatic updates are not feasible, IT administrators should enforce patching policies through centralized deployment tools to ensure all endpoints receive the fix promptly. Additionally, implementing application whitelisting and restricting script execution on untrusted sites can provide an additional layer of defense against exploitation attempts. Security awareness training is also crucial, as users must be educated to recognize suspicious links or downloads that might trigger such vulnerabilities. Monitoring browser logs for anomalous tab behavior or unexpected privilege escalations can aid in early detection of potential exploits in the wild before widespread damage occurs.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories related to injection flaws, particularly CWE-79 which covers Improper Neutralization of Input During Web Page Generation known as Cross-site Scripting, and potentially CWE-20 for improper input validation when dealing with complex state management in web applications. In terms of the MITRE ATT&CK framework, this exploit technique falls under T1059 Command and Scripting Interpreter if it leads to code execution, or more specifically within browser-based attacks like T1189 Drive-by Compromise where a user visits a malicious website that exploits software vulnerabilities. Understanding these mappings helps security teams categorize the threat correctly and apply appropriate detection rules based on established industry standards for vulnerability management and incident response procedures.