CVE-2026-14079: Google Chrome Auth Bypass Vulnerability

CVE-2026-14079 Overview

CVE-2026-14079 is a same-origin policy bypass in the Network component of Google Chrome prior to version 150.0.7871.47. Insufficient policy enforcement allows a remote attacker to craft an HTML page that reads or interacts with resources from a different origin. The flaw is classified under CWE-346: Origin Validation Error. Exploitation requires user interaction, such as visiting an attacker-controlled page. Chromium rates the security severity as Low, while the NVD assigns a CVSS 3.1 base score of 4.3.

Critical Impact
A remote attacker can bypass the same-origin policy through a crafted HTML page, exposing limited cross-origin data to attacker-controlled scripts.

Affected Products

Google Chrome versions prior to 150.0.7871.47
Chromium-based browsers sharing the vulnerable Network component
Desktop stable channel builds released before the June 2026 update

Discovery Timeline

2026-06-30 - CVE-2026-14079 published to NVD
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-14079

Vulnerability Analysis

The vulnerability resides in the Network component of Chrome, which enforces the same-origin policy (SOP) for cross-origin resource access. Insufficient policy checks permit a crafted HTML page to interact with resources outside its origin. The confidentiality and integrity impact is limited: the CVSS vector indicates low integrity impact with no direct confidentiality or availability impact. Exploitation requires the victim to load an attacker-controlled page, typically via phishing or a malicious advertisement. The EPSS score is 0.181%, placing exploitation likelihood in the lower percentile range.

Root Cause

The root cause is an origin validation error [CWE-346] within Chrome's network stack. Policy checks that should isolate cross-origin responses are incomplete, allowing an attacker-controlled document to influence how cross-origin network responses are handled. Chromium's public issue tracker entry documents the internal investigation but withholds specifics until broad patch adoption.

Attack Vector

The attack vector is network-based with low complexity and requires user interaction. An attacker hosts a crafted HTML page that leverages the flawed policy enforcement to bypass SOP restrictions. When a victim visits the page in a vulnerable Chrome build, the page can read or manipulate data that would normally be blocked by origin isolation. No authentication is required, and the attack scope is unchanged.

No public proof-of-concept has been released. Technical specifics remain restricted through the Chromium Issue Tracker Entry pending patch propagation.

Detection Methods for CVE-2026-14079

Indicators of Compromise

Chrome browser processes running versions earlier than 150.0.7871.47 on managed endpoints
Outbound requests to newly registered domains hosting HTML content that triggers cross-origin data reads
Browser telemetry showing unexpected cross-origin fetch or resource load anomalies from user sessions

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 150.0.7871.47
Monitor proxy and DNS logs for user navigation to suspicious domains that host obfuscated HTML or JavaScript
Correlate endpoint browsing telemetry with threat intelligence feeds identifying malicious ad networks and drive-by campaigns

Monitoring Recommendations

Enable enterprise browser reporting to capture version drift and policy violations
Alert on Chrome installations that have not received the stable channel update within organizational SLA windows
Ingest browser and endpoint logs into a central data lake for cross-origin request analysis and retrospective hunting

How to Mitigate CVE-2026-14079

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all desktop platforms
Force restart of Chrome processes after patch deployment to ensure the fixed Network component is active
Verify auto-update is enabled and unblocked on all managed endpoints
Audit Chromium-based browsers in the environment and confirm they have incorporated the upstream fix

Patch Information

Google released the fix in the stable channel update announced in the Chrome Blog Update. Administrators should deploy Chrome 150.0.7871.47 or newer through enterprise management tooling such as Group Policy, Jamf, or Intune. Additional context is available in the Chromium Issue Tracker Entry.

Workarounds

Restrict browsing to trusted sites via enterprise URL allowlists until patching is complete
Deploy content security policies and site isolation enforcement through Chrome enterprise policies
Educate users to avoid unsolicited links and unfamiliar HTML attachments while patch rollout is in progress

bash

# Verify installed Chrome version on Windows endpoints
reg query "HKLM\Software\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv

# Verify installed Chrome version on macOS endpoints
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleShortVersionString

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