CVE-2026-106325 in Chrome
Summary
by MITRE • 10/06/2026
Incorrect reference resolution in Core in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an incorrect reference resolution flaw within the core components of Google Chrome prior to version 155.0.8059.39 represents a significant breach in the browser's isolation mechanisms, specifically targeting the integrity of cross-origin data access controls. This security issue stems from a logical error where the browser fails to correctly resolve references when determining whether content should be accessible across different origins. In web architecture, the Same-Origin Policy is a critical security concept that restricts how documents or scripts loaded from one origin can interact with resources from another origin. When this policy is compromised due to flawed reference resolution, it allows for unauthorized data exfiltration, undermining the fundamental trust model of modern web applications and user privacy expectations.
From a technical perspective, the flaw likely involves an edge case in how Chrome handles object references or resource identifiers during parsing or execution phases. An attacker can craft a malicious HTML page that exploits this misresolution to trick the browser into treating cross-origin resources as if they were same-origin. This manipulation enables the remote attacker to read sensitive data such as cookies, local storage contents, or DOM elements from other websites without user consent. The severity is classified as low by Chromium standards because it requires social engineering to trigger; the victim must be persuaded to visit a specially crafted webpage that initiates the exploit chain. However, even with this requirement for user interaction, the potential impact remains high due to the sensitivity of data typically stored in browser contexts.
The operational impact of this vulnerability centers on information disclosure and potential session hijacking scenarios. By leaking cross-origin data, an attacker could gain access to authentication tokens, personal identifiable information, or other confidential details that users assume are protected by their browsing context boundaries. This aligns with the Common Weakness Enumeration category CWE-200, which covers Information Exposure, as well as CWE-942, pertaining to Permissive Cross-domain References with Untrusted Data. Furthermore, in the context of the MITRE ATT&CK framework, this behavior maps to techniques involving client-side resource scraping or data exfiltration through browser-based attacks, specifically leveraging social engineering tactics like Spearphishing Link under Initial Access and Collection phases where data is gathered from local systems via web browsers.
Mitigation strategies primarily involve updating the Google Chrome installation to version 155.0.8059.39 or later, which contains patches for this reference resolution logic error. Users should ensure that automatic updates are enabled to receive security fixes promptly as they become available. Additionally, organizations can enforce strict Content Security Policies and utilize browser hardening techniques such as disabling JavaScript in untrusted sites through enterprise policies if feasible. Awareness training remains crucial since the attack vector relies on social engineering; users must be educated to recognize suspicious links and avoid interacting with content from unknown or unverified sources that attempt to manipulate browser behavior for data theft purposes.