CVE-2026-11209: Google Chrome Password Memory Disclosure (CVSS 6.5)

Technical summary

This vulnerability stems from an inappropriate implementation in Chrome's password handling subsystem (CWE-200: Information Exposure). An attacker with renderer process control can craft an HTML page that causes sensitive information to leak from process memory. The attack requires network access and user interaction (viewing the malicious page), but no special privileges. The renderer process isolation is a fundamental Chrome security boundary; compromise of that process is the critical assumption. Chromium classified this as medium severity due to the information disclosure nature and required precondition.

Business impact

For organizations relying on Chrome as a corporate browser, this represents a moderate risk that compounds existing renderer compromise scenarios. If an attacker has already exploited another vulnerability or used social engineering to compromise the renderer process, they gain an additional vector to exfiltrate password data and other sensitive memory contents. This amplifies the damage from initial compromise rather than introducing a standalone attack path. Password managers and credential storage integrity should be reviewed in any incident response involving suspected renderer compromise.

Affected systems

Google Chrome on Windows, macOS, and Linux systems running versions prior to 149.0.7827.53 are affected. The vulnerability affects the password handling component across all supported operating systems. Users on Chrome 149.0.7827.53 or later are protected.

Exploitability

Exploitation requires two conditions: (1) prior compromise of the Chrome renderer process, and (2) user interaction with a malicious HTML page. An attacker cannot exploit this in isolation; they need a separate initial foothold. Once the renderer is compromised, the attack is reliable and does not depend on specific Chrome configurations. The CVSS vector reflects network accessibility and user interaction requirements (AV:N/AC:L/UI:R), but notably omits privilege escalation (PR:N) because the attacker is assumed to already control the renderer.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. Organizations should prioritize this update, particularly in environments where additional renderer-process exploits have been observed or where attackers have prior footholds. Enforce automatic Chrome updates through Group Policy (Windows) or MDM profiles (macOS/mobile) to ensure timely patching across fleets.

Patch guidance

Verify deployment of Chrome 149.0.7827.53 or later in your environment. On Windows, check Settings > About Chrome (it auto-updates); on macOS, use System Settings or MDM to confirm version. For managed deployments, configure automatic update policies and monitor rollout. Test on non-production systems first if you have custom configurations or extensions that depend on specific Chrome versions.

Detection guidance

Monitor Chrome version inventory to identify systems still running versions prior to 149.0.7827.53. In incident response, if you discover renderer process compromise from another source, inspect process memory forensics and browser state for signs of data exfiltration coinciding with user visits to untrusted sites. Chrome logs and browser history can correlate suspicious page loads with timing of potential data leaks.

Why prioritize this

This vulnerability merits prompt attention but not emergency-level response, due to the requirement for prior renderer compromise. Organizations should prioritize it alongside other medium-severity Chrome updates and coordinate patching with broader browser update schedules. If you are actively investigating renderer exploits or have evidence of Chrome compromise, elevate this immediately.

Risk score, explained

The CVSS 3.1 score of 6.5 (Medium) reflects confidentiality impact (sensitive memory disclosure) balanced against the prerequisite of renderer compromise. The attack vector is network-based and requires only user interaction, but the impact is limited to information disclosure without integrity or availability effects. The score appropriately captures that this is a serious supplementary risk for already-compromised systems rather than an autonomous threat.

Frequently asked questions