CVE-2026-13963: Google Chrome CSRF Vulnerability

CVE-2026-13963 Overview

CVE-2026-13963 affects Google Chrome versions prior to 150.0.7871.47. The vulnerability stems from an inappropriate implementation in the Chrome DevTools component. A remote attacker can leak cross-origin data by convincing a user to perform specific user interface (UI) gestures on a crafted HTML page. Google's Chromium team classified this issue with a Medium security severity, while the CVSS assessment rates it Low due to the required user interaction and high attack complexity.

The underlying weakness is tracked under [CWE-352] (Cross-Site Request Forgery). Successful exploitation results in limited disclosure of data belonging to a different web origin, bypassing the browser's same-origin policy protections.

Critical Impact
Attackers can leak cross-origin data from a victim's browser session by tricking the user into specific DevTools-related UI interactions on a malicious page.

Affected Products

Google Chrome Desktop versions prior to 150.0.7871.47
Chromium-based browsers incorporating the vulnerable DevTools implementation
All operating system builds of Chrome Stable channel prior to the patched release

Discovery Timeline

2026-06-30 - CVE-2026-13963 published to the National Vulnerability Database (NVD)
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-13963

Vulnerability Analysis

CVE-2026-13963 is a cross-origin information disclosure flaw located in Chrome's DevTools subsystem. DevTools is the built-in developer inspection and debugging suite bundled with Chrome. The inappropriate implementation permits data belonging to a foreign origin to be observed or exfiltrated through interactions initiated from an attacker-controlled page.

The issue is classified as [CWE-352] Cross-Site Request Forgery, indicating that the browser processes an attacker-crafted request or interaction as if it were authorized by the user. The attack requires the victim to perform specific UI gestures, such as clicking, dragging, or invoking a DevTools context menu action on the malicious page.

Root Cause

The root cause lies in DevTools failing to enforce proper origin isolation when handling certain user-driven actions. When a user performs the required gesture, the DevTools code path reads or exposes resources associated with another origin without validating that the initiating context is authorized to access them. This breakdown in origin enforcement enables the cross-origin leak.

Attack Vector

Exploitation is remote and network-based. The attacker hosts a crafted HTML page and lures the victim to visit it. Once on the page, the victim must be persuaded to execute a specific sequence of UI gestures. Because the flaw depends on non-trivial user interaction and precise timing of DevTools state, the attack complexity is high. The confidentiality impact is limited to partial disclosure of cross-origin content, and no integrity or availability impact is present.

No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is 0.133%, indicating a low likelihood of exploitation activity in the near term.

Detection Methods for CVE-2026-13963

Indicators of Compromise

Chrome browser telemetry showing installed versions earlier than 150.0.7871.47 on end-user endpoints
Web proxy or DNS logs recording connections to untrusted domains hosting HTML content that invokes DevTools APIs
User reports of unexpected DevTools panels opening or unusual context-menu prompts while browsing external sites

Detection Strategies

Inventory browser versions across the fleet using endpoint management or software asset tooling and flag any Chrome instance below 150.0.7871.47
Monitor outbound HTTP traffic for pages referencing devtools:// schemes or scripts that programmatically trigger DevTools workflows from untrusted origins
Correlate browsing history with newly registered or low-reputation domains hosting HTML content targeting internal users

Monitoring Recommendations

Enable centralized Chrome browser management to enforce and report on version compliance across managed devices
Route web traffic through a secure web gateway that performs URL categorization and blocks known malicious hosts
Ingest browser and proxy telemetry into a centralized analytics platform to detect anomalous cross-origin data access patterns

How to Mitigate CVE-2026-13963

Immediate Actions Required

Update Google Chrome to version 150.0.7871.47 or later on all managed endpoints through your software distribution platform
Restart Chrome after the update to ensure the patched DevTools binaries are loaded into all active browser processes
Verify Chrome auto-update is enabled and functional on unmanaged or bring-your-own-device endpoints
Educate users about the risk of performing UI actions such as opening DevTools or interacting with unusual prompts on untrusted websites

Patch Information

Google addressed the vulnerability in the Chrome Stable channel release documented in the Google Chrome Stable Update. Additional engineering context is available in the Chromium Issue Tracker Entry. Upgrading to Chrome 150.0.7871.47 or newer removes the vulnerable DevTools code path.

Workarounds

Restrict access to untrusted websites through enterprise web filtering policies until the patch is fully deployed
Apply Chrome enterprise policies to disable developer tools (DeveloperToolsAvailability) for standard user profiles where DevTools access is not required
Enforce site isolation and strict site isolation policies to strengthen cross-origin boundaries within the browser

bash

# Configuration example: Disable DevTools via Chrome enterprise policy on Windows
# Registry path: HKLM\SOFTWARE\Policies\Google\Chrome
# Value name: DeveloperToolsAvailability (DWORD)
# 2 = DeveloperToolsDisallowed
reg add "HKLM\SOFTWARE\Policies\Google\Chrome" /v DeveloperToolsAvailability /t REG_DWORD /d 2 /f