CVE-2026-14023: Google Chrome Auth Bypass Vulnerability

CVE-2026-14023 Overview

CVE-2026-14023 is an input validation vulnerability in the SanitizerAPI component of Google Chrome versions prior to 150.0.7871.47. The flaw allows a remote attacker to bypass the same-origin policy through a crafted HTML page. Chromium classifies this issue with medium security severity, and the vulnerability is tracked under [CWE-20: Improper Input Validation].

Successful exploitation requires user interaction, such as visiting an attacker-controlled web page. Once triggered, the bypass can expose content from other origins to attacker-controlled scripts, breaking a core browser security boundary.

Critical Impact
Attackers can bypass the same-origin policy in Chrome, enabling cross-origin data access and integrity attacks against users who visit a malicious page.

Affected Products

Google Chrome versions prior to 150.0.7871.47
Chromium-based browsers incorporating the vulnerable SanitizerAPI implementation
Desktop stable channel builds distributed before the June 2026 release

Discovery Timeline

2026-06-30 - CVE-2026-14023 published to the National Vulnerability Database
2026-07-01 - Last updated in the NVD database

Technical Details for CVE-2026-14023

Vulnerability Analysis

The vulnerability resides in Chrome's SanitizerAPI, a browser feature designed to sanitize untrusted HTML before insertion into the DOM. Insufficient validation of untrusted input allows crafted markup to slip through the sanitizer in a form that violates same-origin policy assumptions.

Exploitation requires a victim to load an attacker-controlled HTML page. The attack vector is remote over the network, requires no privileges, and depends on user interaction. Successful exploitation impacts integrity by allowing cross-origin data access or manipulation, while confidentiality and availability are not directly affected according to the published CVSS vector.

The EPSS score is 0.319% at the 23.7 percentile, indicating a low probability of exploitation activity in the near term. No public proof-of-concept, exploit code, or in-the-wild abuse has been reported, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Root Cause

The root cause is improper validation of untrusted input inside the SanitizerAPI code path. The sanitizer fails to filter or normalize specific constructs in the HTML input, allowing content that should be neutralized to retain properties capable of crossing origin boundaries. Details are tracked in the Chromium Issue Tracker Entry.

Attack Vector

An attacker hosts a crafted HTML page and lures the victim to open it in a vulnerable Chrome build. The malicious page invokes SanitizerAPI with input constructed to defeat filtering. Once the sanitized output is inserted into the DOM, it executes in a context that bypasses the same-origin policy, granting the attacker unauthorized cross-origin interaction.

No verified proof-of-concept code has been released. Technical specifics are available through the Google Blog Chrome Update and the linked Chromium issue.

Detection Methods for CVE-2026-14023

Indicators of Compromise

Chrome browser processes running versions earlier than 150.0.7871.47 on managed endpoints
Outbound web traffic to unfamiliar domains immediately followed by requests to sensitive internal or SaaS origins from the same tab session
Browser telemetry showing DOM insertions via SanitizerAPI followed by cross-origin fetch or script activity

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any host running a build prior to 150.0.7871.47.
Monitor proxy and DNS logs for user visits to newly registered or low-reputation domains that serve HTML with active scripting.
Correlate browser process telemetry with unexpected access to authenticated origins, which may indicate a same-origin policy bypass in progress.

Monitoring Recommendations

Enable centralized browser management, such as Chrome Browser Cloud Management, to report version state and enforce update policies.
Ingest endpoint and proxy logs into a centralized analytics platform with normalized schemas to enable cross-source correlation.
Alert on execution of Chrome binaries whose version strings fall below the fixed build, and track user browsing to suspicious URLs.

How to Mitigate CVE-2026-14023

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all desktop platforms.
Restart Chrome after updating so patched binaries load into memory and replace running processes.
Push the update through enterprise management tooling to ensure coverage of unattended and remote endpoints.

Patch Information

Google addressed CVE-2026-14023 in the stable channel release documented in the Google Blog Chrome Update. Administrators should confirm the deployed version is at or above 150.0.7871.47. Chromium-based browsers that embed the affected SanitizerAPI implementation should apply their vendor's corresponding update.

Workarounds

Restrict user access to untrusted websites through web filtering or browser isolation until patches are deployed.
Enforce Chrome auto-update policies through enterprise configuration to reduce exposure windows for future issues.
Educate users to avoid opening unsolicited links, since exploitation requires user interaction with a crafted HTML page.

bash

# Verify installed Chrome version on Linux/macOS endpoints
google-chrome --version
# Expected output should be Chrome 150.0.7871.47 or later