CVE-2026-17728 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Extensions in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a cross-site scripting flaw in Google Chrome's extension system that could enable remote code execution through malicious web pages. The issue stems from inadequate input validation and sanitization within the extension framework, specifically affecting versions prior to 151.0.7922.72. The vulnerability allows attackers to inject arbitrary scripts or HTML content into the browser environment, potentially compromising user sessions and system integrity. This type of flaw falls under the category of untrusted data handling within web browser extensions, where malicious actors can craft specially designed HTML pages that exploit the extension API to execute unauthorized code.
The technical implementation defect occurs in how Chrome processes extension-related content when rendering web pages, particularly when dealing with extension permissions and content injection mechanisms. When a user visits a crafted webpage, the malicious HTML can leverage extension APIs or vulnerabilities in the way Chrome handles extension contexts to inject scripts that bypass normal security boundaries. This creates a persistent threat vector where attackers can manipulate browser behavior through seemingly benign web content, potentially accessing sensitive data or performing actions on behalf of the user. The vulnerability operates at the intersection of browser extension architecture and web content rendering, exploiting the trust relationship between extensions and the browser's security model.
The operational impact of this vulnerability extends beyond simple script injection to encompass potential session hijacking, data theft, and privilege escalation within the browser environment. Attackers can leverage this flaw to execute arbitrary code in the context of the victim's browsing session, potentially accessing cookies, local storage, or other sensitive information stored by web applications. The medium severity rating reflects the fact that while exploitation requires user interaction through a malicious webpage, successful exploitation can lead to significant security compromise. This vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation and follows patterns identified in ATT&CK technique T1059.001 for command and scripting interpreter.
Mitigation strategies should focus on immediate patch deployment to update Chrome to version 151.0.7922.72 or later, which contains the necessary fixes for this vulnerability. Organizations should also implement network-level protections such as content filtering and web application firewalls to detect and block malicious payloads before they reach users. Browser hardening measures including disabling unnecessary extensions, implementing strict content security policies, and using sandboxing technologies can reduce the attack surface. Security monitoring should include detection of suspicious extension behavior and unusual network connections originating from browser processes. Additionally, user education regarding safe browsing practices and awareness of social engineering tactics that might lead to visiting malicious websites remains critical for comprehensive protection against such vulnerabilities.