CVE-2026-17962 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Blink 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: Low)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a cross-site scripting issue within the Blink rendering engine that powers Google Chrome and related browsers. The flaw stems from inadequate input validation and sanitization mechanisms within the browser's HTML parsing and rendering components. Attackers could exploit this weakness by crafting malicious HTML pages that would bypass normal security restrictions, allowing them to inject arbitrary scripts or HTML content into web pages viewed by victims. The vulnerability specifically affects versions prior to 151.0.7922.72, indicating a targeted fix for this particular implementation gap in the browser's core rendering logic.
The technical nature of this issue places it within the realm of user interface security flaws that can lead to unauthorized code execution in the context of a victim's browser session. The vulnerability allows for unauthorized script injection and HTML manipulation through carefully crafted web content, potentially enabling attackers to perform actions on behalf of users or extract sensitive information from their browsing sessions. This type of vulnerability typically leverages the browser's trust model where legitimate web content is processed without sufficient validation of embedded elements that could contain malicious payloads.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable more sophisticated attacks such as session hijacking, credential theft, or redirection to malicious sites. The low severity classification from Chromium security team suggests the attack vector requires specific conditions or user interaction, but the potential for exploitation remains significant given the privileged nature of browser execution contexts. This vulnerability could be particularly dangerous in targeted attacks against high-value users or in environments where users frequently interact with untrusted web content.
Mitigation strategies should focus on immediate browser updates to version 151.0.7922.72 or later, which contains the necessary patches to address the input validation gaps. Organizations should also implement additional security measures such as content security policies, regular browser security audits, and user education about avoiding suspicious web content. The vulnerability aligns with CWE-79 which catalogs cross-site scripting flaws, and may map to ATT&CK technique T1566 for social engineering via malicious websites or T1059 for command and scripting interpreter usage through injected scripts.
This particular implementation flaw highlights the ongoing challenges in maintaining secure browser rendering engines where complex HTML parsing logic must balance functionality with security. The vulnerability demonstrates how seemingly minor gaps in input validation can create significant attack surfaces, particularly in browsers that process untrusted content from multiple sources. Security teams should monitor for similar patterns in other browser components and maintain robust patch management procedures to address such vulnerabilities promptly. The remediation process requires not only updating the browser software but also ensuring that web applications implement proper sanitization techniques to prevent exploitation of similar issues in their own codebases.