CVE-2026-17833 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Passwords in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical cross-origin data leakage issue within Google Chrome's password handling mechanisms, specifically affecting versions prior to 151.0.7922.72. The flaw stems from an inadequate implementation of password management features that fails to properly enforce cross-origin security boundaries when processing crafted HTML content. The vulnerability manifests when a remote attacker constructs a malicious HTML page that exploits the browser's password handling subsystem to extract sensitive information from different origins, effectively bypassing fundamental web security principles.
The technical exploitation occurs through improper validation and sanitization of password-related data within Chrome's rendering engine. When a user visits a crafted webpage containing malicious password handling code, the browser's password manager inadvertently leaks cross-origin credentials or associated data to the attacker's domain. This represents a failure in Chrome's Same-Origin Policy enforcement mechanisms, specifically impacting how the browser processes password form elements and credential storage interactions across different origins. The vulnerability falls under CWE-200, which addresses improper information exposure, and demonstrates weaknesses in access control and data protection within web browsers.
The operational impact of this vulnerability extends beyond simple credential theft to encompass broader privacy and security implications for users of affected Chrome versions. Attackers could potentially harvest login credentials, session tokens, or other sensitive authentication data from multiple websites simultaneously, creating a significant risk for users with accounts across different domains. This type of vulnerability is particularly dangerous in phishing attacks where attackers can leverage the cross-origin data leakage to gather comprehensive credential information from victims' browsers. The medium severity classification according to Chromium's security framework indicates that while the vulnerability requires user interaction and specific conditions to exploit, it presents a substantial risk to user privacy and authentication security.
Mitigation strategies should focus on immediate browser updates to versions 151.0.7922.72 or later where this vulnerability has been addressed through proper cross-origin data handling implementations. Security administrators should implement additional monitoring for suspicious password-related network traffic patterns and consider deploying web application firewalls with enhanced cross-origin resource sharing policies. Organizations should also reinforce user education regarding safe browsing practices and credential management, while implementing multi-factor authentication systems to reduce the impact of potential credential theft. The vulnerability highlights the importance of maintaining up-to-date browser software and adheres to ATT&CK technique T1531 which covers 'Account Access Removal' through indirect exploitation pathways that compromise authentication mechanisms rather than direct system access.