CVE-2026-11251: Chrome Password Manager Policy Enforcement Flaw

Technical summary

CVE-2026-11251 is an insufficient policy enforcement vulnerability (CWE-20) in the Password Manager component of Google Chrome prior to version 149.0.7827.53. The flaw permits a threat actor with an existing renderer process compromise to circumvent discretionary access controls (DAC) through a specially crafted HTML page, potentially enabling unauthorized disclosure of stored authentication credentials. The attack requires user interaction and network accessibility to a malicious page. No privilege escalation or integrity compromise is possible through this vector alone.

Business impact

Password manager bypasses represent a medium business concern despite the low CVSS score, because successful exploitation exposes an organization's credential vault if a renderer compromise occurs. This could cascade into lateral movement, account takeover, and unauthorized access to downstream systems. The practical risk depends on whether your organization has enforced Chrome as a standard browser and how thoroughly you isolate renderer compromises via sandboxing and network segmentation.

Affected systems

The vulnerability affects Google Chrome on all major platforms: Windows, macOS, and Linux systems running Chrome version 149.0.7827.53 or earlier. Android Chrome is not mentioned in the advisory. The underlying Chromium engine is shared across multiple browser vendors and Electron-based applications, so derivative products built on affected Chromium versions should also be reviewed. Verify patch status across your browser deployment inventory.

Exploitability

Exploitation is not trivial and requires a multi-stage attack: First, the attacker must compromise Chrome's renderer process through a separate vulnerability or attack method (sandbox escape, use-after-free, etc.). Then, the victim must visit a malicious HTML page crafted to trigger the policy enforcement gap. Finally, user interaction is required. This is not a remote code execution or standalone renderer bypass; it's a post-compromise privacy leakage issue. Active exploitation in the wild is not documented (KEV status: no).

Remediation

Update Chrome to version 149.0.7827.53 or later on all platforms. The patch hardens policy enforcement within the password manager to prevent unauthorized access from a compromised renderer. Organizations should automate Chrome updates via management tools (Google Admin, Intune, or equivalent) and verify completion across the fleet. Secondary controls—such as enforcing password manager integration restrictions or limiting renderer permissions via security policies—can provide additional defense layers.

Patch guidance

Deploy Chrome version 149.0.7827.53 or newer via your browser management platform. Verify that auto-update is enabled for Chrome; if manual deployment is required, prioritize systems where users store sensitive credentials in Chrome's built-in password manager. Test the patch in a non-production environment first if you have custom enterprise policies or extensions that interact with the password manager. No rollback issues have been reported.

Detection guidance

Monitor Chrome version inventory to identify systems running versions prior to 149.0.7827.53. Check audit logs for abnormal password manager access patterns or credential exfiltration attempts if you suspect a renderer compromise has occurred in your environment. Network detection is difficult because the attack uses only crafted HTML; focus instead on identifying the prerequisite renderer compromise through memory dumps, crash logs, or sandbox escape indicators. Endpoint detection and response (EDR) tools should monitor for processes that attempt to read Chrome's credential storage directly.

Why prioritize this

Although the CVSS score is low (3.1), patching is important for any organization using Chrome with stored credentials. Prioritize based on your actual use of Chrome's password manager and your risk tolerance for credential disclosure. If you enforce a centralized password manager (Okta, 1Password, LastPass) and discourage use of Chrome's native storage, the practical risk is reduced. If Chrome's password manager is widely used, treat this as a normal-priority patch cycle update. This is not an emergency but should not be deferred beyond monthly maintenance windows.

Risk score, explained

The CVSS 3.1 score of 3.1 (LOW) reflects the attack's constraints: high complexity (AC:H) due to the need for a pre-existing renderer compromise, requirement for user interaction (UI:R), and limited impact scope (confidentiality only, no integrity or availability damage). The network attack vector (AV:N) acknowledges that the malicious HTML can be delivered remotely, but the prerequisite renderer compromise anchors the difficulty significantly higher than a direct vulnerability would be. The score appropriately downgrades an otherwise high-impact credential disclosure to low severity because of its strict exploitation preconditions.

Frequently asked questions