CVE-2026-103627 in Chrome
Summary
by MITRE • 10/02/2026
Information leak in SVG in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/02/2026
The vulnerability identified as an information leak within the Scalable Vector Graphics rendering engine of Google Chrome prior to version 154.0.8037.97 represents a significant breach in browser isolation and data confidentiality mechanisms. This flaw allows a remote attacker, through the delivery of a specially crafted HTML page containing malicious SVG content, to extract sensitive information that should remain inaccessible to untrusted web contexts. The severity is classified as Medium by Chromium security standards, indicating that while the impact is substantial for targeted attacks or in conjunction with other vulnerabilities, it may not independently lead to full system compromise without additional exploitation steps.
At a technical level, this vulnerability stems from improper handling of memory states or data structures within the SVG parser and renderer components. When processing complex or malformed vector graphics definitions, the browser fails to properly isolate internal state information from external access points. This oversight enables an attacker to craft HTML pages that trigger specific rendering paths where sensitive data, such as cross-origin cookies, local storage contents, or other session-specific details, is inadvertently exposed through side channels or direct memory reads facilitated by the SVG object model. The attack vector relies on social engineering or drive-by download tactics where a victim visits a malicious webpage designed to exploit this parsing logic error.
The operational impact of this vulnerability centers on unauthorized data disclosure rather than code execution or privilege escalation. An attacker can potentially steal user credentials, session tokens, or other personally identifiable information stored within the browser context. This compromises the confidentiality integrity of web applications and undermines trust in secure browsing environments. In enterprise settings, such leaks could lead to credential theft if users are logged into sensitive corporate portals while visiting compromised sites. The ability to obtain this data remotely makes it a persistent threat for phishing campaigns and targeted espionage operations aiming at high-value targets.
Mitigation strategies primarily involve updating the browser software to version 154.0.8037.97 or later, where these parsing errors have been corrected by Google’s security team. Users should ensure automatic updates are enabled to receive patches promptly as they become available. For organizations deploying Chrome across endpoints, centralized management policies can enforce update compliance and restrict the installation of older, vulnerable versions. Additionally, implementing strict Content Security Policies (CSP) on web applications can help mitigate some risks by limiting how scripts interact with embedded objects like SVGs, although this does not fully address browser-level rendering flaws.
From a classification perspective, this vulnerability aligns with CWE-200: Information Exposure, which covers scenarios where sensitive information is disclosed to unauthorized actors without necessarily being corrupted or destroyed. It also relates to ATT&CK technique T1537: Transfer Data to Cloud Account if the exfiltrated data is sent externally by the attacker’s script, though more directly it fits within general reconnaissance and collection phases involving browser-based exploitation. Security teams should monitor for indicators of compromise associated with SVG injection attacks and review logs for unusual network traffic patterns originating from browsers that may indicate successful exploitation attempts before patching occurs.