CVE-2026-11176 in Chrome
Summary
by MITRE • 06/05/2026
Inappropriate implementation in Media in Google Chrome prior to 149.0.7827.53 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 • 06/05/2026
This vulnerability represents a cross-origin data leakage issue within Google Chrome's media handling subsystem that existed prior to version 149.0.7827.53. The flaw stems from inadequate implementation of cross-origin resource restrictions when processing media content, specifically affecting how the browser handles media elements from different origins. The vulnerability falls under the category of improper access control mechanisms and can be classified as a variant of cwe-200, which deals with information exposure. Attackers could exploit this weakness by crafting malicious HTML pages that leverage media elements to access or infer data from other origins, effectively bypassing the same-origin policy that normally protects web applications from cross-origin information leakage.
The technical implementation flaw occurs in Chrome's media processing pipeline where the browser fails to properly enforce origin-based security boundaries when handling media resources. This allows a remote attacker to construct HTML pages that contain specially crafted media elements designed to trigger cross-origin data leakage. The vulnerability operates at the browser level rather than at the application layer, making it particularly dangerous as it can be exploited through standard web browsing without requiring special privileges or user interaction beyond visiting a malicious website. The medium severity classification reflects the fact that while the vulnerability enables data leakage, it does not provide full system compromise or arbitrary code execution capabilities.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable sophisticated reconnaissance attacks where attackers gather sensitive data from other origins including user credentials, session tokens, or personal information. This type of attack aligns with techniques described in the attack pattern taxonomy under attack-1207, which covers cross-site scripting and information leakage attacks. The vulnerability affects all users of affected Chrome versions and can be exploited through standard web browsers without requiring specialized tools or knowledge of advanced exploitation techniques. Organizations relying on Chrome-based applications face potential risks to user privacy and data confidentiality, particularly in environments where users may encounter malicious websites or where sensitive data is processed through browser-based media components.
Mitigation strategies should focus on immediate browser updates to versions 149.0.7827.53 or later where the vulnerability has been patched. Network administrators should implement additional security controls including web application firewalls and content security policies that restrict media resource loading from untrusted origins. Browser security configurations should be reviewed to ensure that cross-origin restrictions are properly enforced, and users should be educated about the risks of visiting untrusted websites. Organizations may also consider implementing additional monitoring for suspicious cross-origin resource requests and establishing incident response procedures for potential exploitation attempts. The fix implemented by google addresses the core issue in chrome's media handling logic and restores proper cross-origin isolation boundaries for media resources.