CVE-2026-7932: Google Chrome Auth Bypass Vulnerability

CVE-2026-7932 Overview

CVE-2026-7932 is an insufficient policy enforcement vulnerability in the Downloads component of Google Chrome prior to version 148.0.7778.96. A local attacker can bypass navigation restrictions by serving a crafted HTML page to the targeted user. The flaw requires user interaction and operates at a local attack vector, limiting remote exploitation potential. Google classified the Chromium security severity as Medium, and the issue affects Chrome installations across Windows, macOS, and Linux. Successful exploitation can result in limited confidentiality and integrity impact, primarily through circumvention of download-related security policies. The vulnerability was addressed in the Chrome Stable channel update released by Google.

Critical Impact
Attackers can bypass Chrome's download navigation restrictions through crafted HTML, enabling policy evasion that may lead to unauthorized file delivery or interaction.

Affected Products

Google Chrome versions prior to 148.0.7778.96
Microsoft Windows, Apple macOS, and Linux desktop installations of Chrome
Chromium-derived browsers that share the affected Downloads policy enforcement code

Discovery Timeline

2026-05-06 - CVE-2026-7932 published to NVD
2026-05-06 - Last updated in NVD database

Technical Details for CVE-2026-7932

Vulnerability Analysis

The vulnerability resides in Chrome's Downloads component, where policy enforcement around navigation restrictions is incomplete. Chrome implements navigation policies to prevent untrusted content from triggering or redirecting download flows in unsafe ways. When a user opens a crafted HTML page, the page can manipulate download-initiated navigation in a manner that the browser does not properly block. This effectively allows an attacker to bypass restrictions designed to prevent abuse of the download pipeline. The categorization aligns with broken access control logic ([CWE-NVD-CWE-noinfo] in the NVD entry), since the policy check exists but does not cover all reachable code paths.

Root Cause

The root cause is insufficient validation within the Downloads subsystem when handling navigation events triggered by HTML content. The enforcement logic fails to apply navigation restrictions consistently across all download-related transitions. As a result, a maliciously authored page can construct sequences that evade the intended policy boundary.

Attack Vector

Exploitation requires local access and user interaction, such as opening a crafted HTML file or visiting attacker-controlled local content. The attacker must convince the user to interact with the page, after which the bypass executes within the browser context. The impact is limited to confidentiality and integrity at a low level, with no direct availability impact.

No public proof-of-concept code or exploit is available for CVE-2026-7932. Technical details are tracked in the Chromium Issue Tracker Entry.

Detection Methods for CVE-2026-7932

Indicators of Compromise

Chrome browser instances running versions earlier than 148.0.7778.96 on managed endpoints
Unexpected download events originating from locally rendered HTML files in user temp or download directories
Browser process activity launching child processes or writing files outside expected download policy scopes

Detection Strategies

Inventory installed Chrome versions across the fleet and flag hosts running versions below 148.0.7778.96
Correlate browser telemetry with file write events to identify downloads that bypass enterprise download policy controls
Monitor for crafted local HTML files being opened by Chrome, particularly from email attachments, removable media, or messaging clients

Monitoring Recommendations

Enable browser management telemetry to surface download events, navigation transitions, and policy violations
Forward Chrome enterprise reporting logs to a centralized SIEM for correlation with endpoint events
Track user interaction with HTML files originating from untrusted sources and review download paths for anomalies

How to Mitigate CVE-2026-7932

Immediate Actions Required

Update Google Chrome to version 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints
Validate Chromium-based browsers for vendor-specific patches that incorporate the upstream fix
Restrict execution of untrusted local HTML files, particularly those delivered via email or external media

Patch Information

Google released the fix in the Chrome Stable channel as documented in the Google Chrome Update Announcement. Administrators should ensure automatic updates are enabled or push the update via enterprise management tooling. Verify the deployed build is 148.0.7778.96 or newer.

Workarounds

Enforce Chrome enterprise policies that restrict downloads to approved sources and block execution of untrusted file types
Apply application allowlisting to prevent users from opening arbitrary local HTML files in Chrome
Educate users to avoid opening unsolicited HTML attachments and to report suspicious files to the security team

bash

# Verify installed Chrome version on Linux/macOS
google-chrome --version

# Windows: query installed version via registry
reg query "HKLM\Software\Google\Chrome\BLBeacon" /v version