CVE-2026-17885 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Paint in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data 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-origin resource sharing issue within the paint subsystem of google chrome browser affecting versions prior to 151.0.7922.72. The flaw stems from inadequate implementation of origin validation mechanisms when processing painted graphical elements, allowing malicious actors to exploit this weakness through carefully crafted html pages. The vulnerability falls under the category of improper access control as defined by cwe-284 and represents a specific instance of information disclosure through cross-origin data leakage.
The technical execution of this attack involves constructing malicious html content that triggers the vulnerable paint rendering code path, enabling an attacker to access resources from different origins that should normally be restricted. This type of exploitation leverages the browser's rendering engine capabilities to bypass standard security boundaries. The medium severity classification indicates that while the vulnerability does not provide direct system compromise capabilities, it does enable unauthorized data access across origin boundaries, which can lead to sensitive information disclosure.
From an operational impact perspective, this vulnerability exposes users to potential data leakage scenarios where cross-origin resources such as images, fonts, or other graphical elements could be accessed by malicious websites. The attack requires only a crafted html page to be loaded in the vulnerable browser version, making it particularly dangerous as it can be delivered through various attack vectors including phishing campaigns, compromised websites, or malicious advertisements. This represents a violation of the same origin policy that forms a fundamental security boundary in web browsers.
The mitigation strategy involves updating to google chrome version 151.0.7922.72 or later where the vulnerability has been patched. Organizations should implement comprehensive patch management procedures to ensure all browser installations are current with the latest security updates. Additionally, network administrators can deploy content filtering solutions and web application firewalls to detect and block suspicious html content that may attempt to exploit this vulnerability. This issue aligns with att&ck technique t1566 for initial access through malicious content delivery and demonstrates the importance of maintaining up-to-date browser versions as part of overall cybersecurity hygiene practices. The vulnerability highlights the critical nature of proper origin validation in web rendering engines and serves as a reminder that even seemingly benign functionality can present security risks when not properly secured against cross-origin attacks.