CVE-2026-79003: Google Chrome Authorization Bypass Vulnerability

CVE-2026-79003 Overview

CVE-2026-79003 is an incorrect authorization vulnerability [CWE-863] in the Device component of Google Chrome. Versions prior to 152.0.7977.65 fail to properly enforce system access restrictions. A remote attacker can craft a malicious HTML page that, combined with social engineering, bypasses these restrictions when a user interacts with it. Google's Chromium project rates the security severity as Medium. The flaw affects the desktop Stable channel and is addressed in the Chrome 152 update.

Critical Impact
A remote attacker can bypass Chrome's device access controls through a crafted web page, enabling unauthorized interaction with system-level device resources when a victim is lured into visiting attacker-controlled content.

Affected Products

Google Chrome for Desktop prior to 152.0.7977.65
Chromium-based browsers incorporating the vulnerable Device component
Windows, macOS, and Linux Chrome Stable channel builds

Discovery Timeline

2026-08-25 - CVE-2026-79003 published to the National Vulnerability Database
2026-08-26 - Entry last modified in the NVD

Technical Details for CVE-2026-79003

Vulnerability Analysis

The vulnerability resides in Chrome's Device subsystem, which mediates browser access to system devices and related capabilities. An authorization check in this component does not correctly validate the caller's permissions before granting access. A remote attacker who convinces a user to open a crafted HTML page can trigger the flawed code path and bypass system access restrictions that would normally block untrusted web content.

Exploitation requires user interaction, consistent with the social engineering vector referenced in the advisory. This aligns with the Chromium Medium severity rating and the current EPSS probability of 0.294%, which places the CVE in a low-likelihood band for near-term exploitation activity.

Because the flaw sits in a component that brokers device access, successful exploitation could expose functionality that the same-origin policy and permission prompts are designed to gate. Refer to Chromium Issue #522791354 for tracking details.

Root Cause

The root cause is an incorrect authorization check [CWE-863] in the Device component. The code path evaluates the caller's context but does not enforce the full set of restrictions required before releasing a protected capability. Full technical detail is embargoed in the linked Chromium issue.

Attack Vector

The attack vector is remote and web-based. An attacker hosts a crafted HTML page and uses social engineering to induce a victim running a vulnerable Chrome build to open it. Once loaded, the page executes JavaScript that reaches the vulnerable Device code path and bypasses the intended access restriction.

No verified proof-of-concept code has been published. Public technical detail is limited pending broader patch adoption; see the Google Chrome Stable Update release note.

Detection Methods for CVE-2026-79003

Indicators of Compromise

Chrome browser processes on endpoints running versions earlier than 152.0.7977.65 after the patch release date
Outbound connections from browser processes to unfamiliar domains immediately following user click-through from email, chat, or ad content
Unexpected child processes or device access requests originating from chrome.exe, Google Chrome, or chrome binaries

Detection Strategies

Inventory installed Chrome versions across managed endpoints and flag any build below 152.0.7977.65
Correlate browser telemetry with URL reputation and DNS logs to surface user visits to newly registered or low-reputation domains
Alert on anomalous device or hardware API usage initiated from renderer processes

Monitoring Recommendations

Track Chrome version drift through endpoint management and browser enterprise reporting
Monitor the Chrome Releases blog for further advisories referencing the Device component
Review web proxy logs for repeated visits to pages that trigger device permission prompts followed by unusual system activity

How to Mitigate CVE-2026-79003

Immediate Actions Required

Update Google Chrome to 152.0.7977.65 or later on all Windows, macOS, and Linux endpoints
Restart Chrome after updating to ensure the patched binary is loaded across all profiles
Update Chromium-based browsers and embedded WebView components once vendors ship equivalent fixes

Patch Information

Google addressed CVE-2026-79003 in Chrome Stable 152.0.7977.65. Details are available in the Google Chrome Stable Update release note and tracked in Chromium Issue #522791354. Enterprise administrators should push the update through Chrome Browser Cloud Management, Group Policy, or their standard software distribution channel.

Workarounds

Enforce automatic Chrome updates through enterprise policy to reduce exposure windows
Restrict user-initiated navigation to untrusted sites via web filtering and DNS security controls
Deliver targeted user awareness reminders about social engineering lures that request device or hardware permissions in the browser

bash

# Verify Chrome version on Linux/macOS endpoints
google-chrome --version
# Expected output: Google Chrome 152.0.7977.65 or later

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