CVE-2026-13896: Google Chrome Auth Bypass Vulnerability

CVE-2026-13896 Overview

CVE-2026-13896 is a policy enforcement flaw in the Glic component of Google Chrome versions prior to 150.0.7871.47. The vulnerability allows a remote attacker to bypass navigation restrictions by serving a crafted HTML page to a targeted user. Google classifies the Chromium security severity as Medium. The weakness maps to CWE-602: Client-Side Enforcement of Server-Side Security, reflecting an implementation gap in how Glic validates navigation policy. Exploitation requires user interaction, typically by luring the victim to a malicious website. Successful exploitation impacts integrity by permitting navigation to destinations that should be blocked by browser policy.

Critical Impact
Remote attackers can bypass Chrome's navigation restrictions via crafted HTML, undermining trust boundaries enforced by the Glic component across Windows, macOS, and Linux desktops.

Affected Products

Google Chrome versions prior to 150.0.7871.47 on Microsoft Windows
Google Chrome versions prior to 150.0.7871.47 on Apple macOS
Google Chrome versions prior to 150.0.7871.47 on Linux

Discovery Timeline

2026-06-30 - CVE-2026-13896 published to NVD
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-13896

Vulnerability Analysis

The vulnerability resides in Glic, a Chrome component that mediates certain navigation behaviors. Insufficient policy enforcement means Glic does not consistently validate navigation requests against the browser's configured restrictions. An attacker who controls a web page can construct HTML that triggers navigations Glic should otherwise deny. The result is an integrity impact on the browsing session, with no direct exposure of confidentiality or availability. Because the attack occurs over the network and requires only user interaction with attacker-controlled content, phishing and drive-by lures are realistic delivery paths.

Root Cause

The root cause is client-side policy enforcement that fails to cover all navigation code paths in Glic. Under [CWE-602], the browser relies on checks that a crafted document can sidestep, allowing navigation flows to proceed without adequate validation. Google addressed the gap in Chrome 150.0.7871.47 through updated enforcement logic tracked in the Chromium Issue Tracker Entry.

Attack Vector

Exploitation is remote and network-based. A user must visit or interact with an attacker-controlled page that contains the crafted HTML payload. Once loaded, the page issues navigation actions that Glic fails to restrict. The attacker gains the ability to redirect the user or reach resources outside the intended navigation policy. No elevated privileges are required on the target system, and no authentication to Chrome is needed. See the Google Chrome Desktop Update for the vendor's advisory.

No verified public proof-of-concept code is available for CVE-2026-13896. Technical specifics remain restricted in the Chromium issue tracker at the time of publication.

Detection Methods for CVE-2026-13896

Indicators of Compromise

Chrome browser telemetry showing installed versions earlier than 150.0.7871.47 across managed endpoints.
Web proxy logs recording navigations to unexpected destinations immediately after user visits to untrusted sites.
HTML content served with unusual navigation patterns targeting Glic-mediated flows.

Detection Strategies

Inventory Chrome versions using endpoint management tooling and flag any host below 150.0.7871.47.
Correlate URL categorization logs with browser session events to identify navigation policy anomalies.
Alert on outbound requests to newly registered domains initiated by Chrome shortly after page loads from low-reputation origins.

Monitoring Recommendations

Track Chrome update compliance continuously through configuration management and enterprise policy dashboards.
Monitor DNS and HTTP telemetry for redirect chains that terminate at credential harvesting or malware distribution sites.
Review browser extension and enterprise policy logs to confirm navigation restrictions remain enforced after updates.

How to Mitigate CVE-2026-13896

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all Windows, macOS, and Linux endpoints.
Force a browser restart across the fleet to ensure the patched binary is loaded into active sessions.
Verify enterprise Chrome policies for auto-update remain enabled and unblocked by network controls.

Patch Information

Google released the fix in the Chrome Stable channel at version 150.0.7871.47. Refer to the Google Chrome Desktop Update for release details and the Chromium Issue Tracker Entry for issue metadata. Deploy the update through standard patch management, Chrome Browser Cloud Management, or platform package repositories.

Workarounds

Restrict browsing to trusted destinations using web filtering or a secure web gateway until patching completes.
Enforce Chrome enterprise policies that limit navigation to allowlisted domains for high-risk user groups.
Provide user awareness guidance to avoid clicking links from unsolicited email or messaging content while updates are rolled out.

bash

# Verify Chrome version on Linux endpoints
google-chrome --version

# Example: enforce minimum version check in a management script
REQUIRED="150.0.7871.47"
INSTALLED=$(google-chrome --version | awk '{print $3}')
if [ "$(printf '%s\n' "$REQUIRED" "$INSTALLED" | sort -V | head -n1)" != "$REQUIRED" ]; then
  echo "Chrome $INSTALLED is vulnerable to CVE-2026-13896 - update required"
fi