CVE-2026-95327 in Chrome
Summary
by MITRE • 09/29/2026
Information leak in Networking in Google Chrome prior to 154.0.8037.57 allowed a remote attacker to leak sensitive information via a crafted HTML page. (Chromium security severity: Low)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified as an information leak within the networking subsystem of Google Chrome, specifically affecting versions prior to 154.0.8037.57, represents a critical failure in memory safety and data isolation mechanisms. This flaw allows a remote attacker to extract sensitive information that should remain inaccessible to untrusted web content. The root cause typically lies in improper handling of network requests or responses where internal state variables are exposed through side channels or direct memory access due to insufficient boundary checks within the Chromium engine's networking stack. Such vulnerabilities often stem from use-after-free conditions, buffer over-reads, or incorrect pointer arithmetic that permits reading beyond allocated buffers into adjacent memory regions containing sensitive data such as authentication tokens, session cookies, or internal application state.
From a technical perspective, this vulnerability falls under the category of improper information disclosure, which is formally classified in the Common Weakness Enumeration (CWE) database as CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. The attack vector involves crafting a malicious HTML page that leverages specific JavaScript APIs or browser features to trigger the flawed networking logic. When a victim visits this crafted page, the browser's rendering engine processes the request in a manner that inadvertently reveals memory contents. This could manifest as timing differences, error messages containing stack traces, or direct data exfiltration through canvas fingerprinting techniques if the leaked information affects visual output. The severity is rated as Low by Chromium security standards because while it allows for data leakage, it generally requires user interaction to visit a malicious site and may not provide immediate code execution capabilities, yet it remains dangerous in contexts where sensitive session data or internal application logic can be harvested.
The operational impact of this vulnerability extends beyond simple data theft; it undermines the fundamental trust model of web browsers which rely on strict same-origin policies and sandboxing to isolate untrusted content from privileged system resources. An attacker exploiting this flaw could potentially gain insights into a user's browsing habits, steal session identifiers leading to account takeover, or gather intelligence about internal network configurations if the browser is used in enterprise environments with specific proxy settings. In advanced persistent threat scenarios, such information leaks can serve as an initial foothold for further exploitation by providing context that aids in crafting more targeted attacks against specific applications or services accessed via the compromised session.
Mitigation strategies primarily involve immediate patching to version 154.0.8037.57 or later where these memory safety issues have been addressed through rigorous code reviews and fuzz testing. Developers should ensure that all network-related APIs enforce strict bounds checking and validate pointer integrity before dereferencing them. Additionally, employing compiler-based security features such as Address Sanitizer during development can help detect such out-of-bounds reads early in the lifecycle. For end-users, maintaining up-to-date browsers is essential to prevent exploitation of known memory corruption flaws. Security teams should also monitor for indicators of compromise related to unusual network traffic patterns or unexpected data exfiltration attempts that might indicate active exploitation of similar vulnerabilities in older software versions not yet patched across all endpoints.