CVE-2026-11253 in Chrome
Summary
by MITRE • 06/05/2026
Inappropriate implementation in Permissions 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: Low)
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a permissions implementation flaw in Google Chrome that existed prior to version 149.0.7827.53, classified as a low severity issue by Chromium security standards. The vulnerability stems from inadequate handling of cross-origin data access permissions within the browser's security model, creating a potential information disclosure channel that could be exploited by remote attackers. The flaw specifically manifests when a malicious actor crafts a specially designed html page that can bypass normal permission boundaries between different origins, allowing unauthorized access to data that should remain isolated between domains.
The technical nature of this vulnerability lies in the browser's permission system failing to properly enforce cross-origin restrictions during data access operations. When a user visits a crafted html page, the malicious code can leverage the flawed permission implementation to extract data from other origins that would normally be protected by the same-origin policy. This type of vulnerability typically involves manipulation of browser APIs or features that handle permissions and access controls, where the normal security boundaries are not properly enforced. The vulnerability is categorized under CWE-284 which deals with improper access control mechanisms, specifically focusing on inadequate permission checking or enforcement in web browser implementations.
The operational impact of this vulnerability, while classified as low severity, represents a significant concern for browser security and user privacy. Remote attackers can potentially exploit this flaw to gather sensitive information from other domains without proper authorization, which could lead to data leakage scenarios in environments where users visit untrusted websites. The vulnerability affects the fundamental security model of the browser by allowing cross-origin data access that should be restricted, potentially enabling more sophisticated attacks when combined with other vulnerabilities or when targeting specific user data. Users may be exposed to information disclosure risks when visiting malicious websites, particularly in scenarios involving multiple tabs or when browsing sites with complex cross-origin interactions.
Mitigation strategies for this vulnerability involve updating to Google Chrome version 149.0.7827.53 or later, which contains the necessary patches to correct the permission implementation flaw. Organizations should ensure their browser deployment policies include regular updates to maintain protection against known vulnerabilities. Network administrators and security teams should monitor for any signs of exploitation attempts and consider implementing additional security measures such as content security policies and browser hardening configurations. The fix likely addresses the specific permission checking logic that was allowing cross-origin data leakage, restoring proper enforcement of same-origin policy boundaries. This vulnerability highlights the importance of maintaining up-to-date browser software and demonstrates how even low severity issues can represent significant security risks in browser environments where complex permission models are involved. The remediation aligns with standard security practices for addressing access control vulnerabilities and maintaining the integrity of browser security models.