CVE-2026-95289 in Chrome
Summary
by MITRE • 09/29/2026
Incorrect authorization in Scroll in Google Chrome prior to 154.0.8037.57 allowed a remote attacker leveraging social engineering to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified as an incorrect authorization issue within the scrolling mechanism of Google Chrome prior to version 154.0.8037.57 represents a significant breach in browser-level isolation boundaries. This flaw specifically affects how the user agent handles cross-origin data access during scroll events, allowing for potential information leakage between different web contexts that should remain strictly separated by default security policies. The core technical deficiency lies in the failure to properly validate or restrict permissions when processing input related to scrolling actions across frames or iframes originating from distinct domains. In a standard secure browsing environment, cross-origin data access is heavily restricted to prevent malicious sites from reading sensitive content hosted on other origins, such as personal emails, financial details, or session tokens stored in local storage or cookies. However, this specific implementation error creates an unintended pathway where the browser's internal state management for scroll positions and related event handlers does not adequately enforce these same-origin policy constraints under certain conditions.
The operational impact of this vulnerability is primarily centered on unauthorized data exfiltration through social engineering tactics rather than a fully automated remote code execution or silent background exploit. An attacker must leverage social engineering to persuade a victim to visit a specially crafted HTML page hosted on a malicious domain. Once the user interacts with the page, potentially by scrolling within an embedded frame or interacting with elements that trigger scroll events across origin boundaries, the flaw allows the malicious script to read cross-origin data that it should not have access to. This could include sensitive information displayed in iframes from legitimate websites, such as banking portals, email clients, or corporate intranets, provided those sites do not implement additional protective headers like X-Frame-Options or Content-Security-Policy frame-ancestors directives effectively against this specific vector. The severity is classified as medium because while the impact involves sensitive data exposure, it requires user interaction and does not typically lead to full system compromise or arbitrary code execution on the host machine.
From a classification perspective, this vulnerability aligns with CWE-269, which denotes Improper Authorization, specifically in the context of accessing resources without proper permission checks within the application logic. It also relates closely to CWE-359, Exposed Private Personal Information, as the primary consequence is the unauthorized disclosure of user-specific data across domain boundaries. In terms of offensive security frameworks such as MITRE ATT&CK, this behavior corresponds to techniques under T1005, Data from Local System, particularly when combined with social engineering tactics found in T1566, Phishing. The attack vector relies on the attacker crafting a webpage that exploits the browser's handling of scroll events to bypass origin checks, effectively turning a standard user interaction into a data theft mechanism. This highlights the complexity of maintaining strict isolation boundaries in modern web browsers where numerous event handlers and state variables interact dynamically during normal usage scenarios like scrolling through content-heavy pages or complex single-page applications.
Mitigation for this vulnerability requires immediate action by updating Google Chrome to version 154.0.8037.57 or later, which contains the necessary patches to correct the authorization logic within the scroll handling subsystem. For organizations managing large fleets of browsers, deploying these updates via centralized management tools is critical to ensure all endpoints are protected against this specific cross-origin data leakage vector. Additionally, web developers and site administrators should reinforce their security posture by implementing robust Content Security Policy headers that restrict framing from unauthorized origins. This includes using the frame-ancestors directive in CSP to prevent malicious sites from embedding sensitive content in iframes where such scroll-based exploits might be triggered. Furthermore, users should remain vigilant against suspicious links or pages requesting unusual permissions or exhibiting abnormal behavior during interaction, as social engineering remains a key component of this attack chain. Regular security awareness training can help mitigate the risk by educating employees on recognizing potential phishing attempts that aim to exploit browser vulnerabilities for data theft.