CVE-2025-4050: Google Chrome DevTools RCE Vulnerability

CVE-2025-4050 Overview

CVE-2025-4050 is an out-of-bounds memory access vulnerability in the DevTools component of Google Chrome versions prior to 136.0.7103.59. A remote attacker can exploit the flaw by serving a crafted HTML page and convincing the user to perform specific UI gestures. Successful exploitation can trigger heap corruption, leading to potential code execution within the browser process. Google classifies the Chromium security severity as Medium, while the NVD assigns a higher CVSS score reflecting the impact on confidentiality, integrity, and availability. The vulnerability is tracked under [CWE-787] (Out-of-bounds Write).

Critical Impact
An attacker who lures a victim into interacting with a malicious page can corrupt heap memory in Chrome DevTools and potentially achieve arbitrary code execution in the renderer context.

Affected Products

Google Chrome desktop versions prior to 136.0.7103.59
Chromium-based browsers incorporating the vulnerable DevTools code
All operating systems supported by Chrome Stable channel (Windows, macOS, Linux)

Discovery Timeline

2025-05-05 - CVE-2025-4050 published to NVD
2025-05-28 - Last updated in NVD database

Technical Details for CVE-2025-4050

Vulnerability Analysis

The vulnerability resides in Chrome's DevTools subsystem, the integrated developer tooling used to inspect and debug web content. DevTools processes data structures derived from the rendered page and from user interactions in the inspector interface. An out-of-bounds memory access occurs when the code reads or writes beyond the bounds of an allocated heap buffer.

Because the affected operation touches heap-resident objects, controlled corruption can overwrite adjacent metadata, function pointers, or object headers. Attackers leveraging such primitives typically chain them with other techniques to escape the renderer sandbox or escalate to arbitrary code execution. The flaw requires user interaction, classified as specific UI gestures, which raises the bar for exploitation but does not eliminate it in targeted scenarios.

Root Cause

The root cause is improper bounds checking in DevTools code paths that operate on heap-allocated buffers. The condition maps to [CWE-787], indicating that an index, offset, or pointer reaches memory outside the intended allocation. Detailed analysis is restricted in the Chromium Issue Report #409342999 per Google's standard disclosure practice.

Attack Vector

Exploitation is network-based and requires user interaction. An attacker hosts a crafted HTML page and convinces the target to open DevTools and perform a specific UI gesture, such as inspecting a malicious element or triggering a panel action. The crafted content steers DevTools into the vulnerable code path, producing heap corruption that the attacker can shape for further exploitation.

No public proof-of-concept code or in-the-wild exploitation has been reported for this issue. Technical details remain restricted in the upstream Chromium tracker.

Detection Methods for CVE-2025-4050

Indicators of Compromise

Unexpected Chrome renderer or browser process crashes coinciding with DevTools being open on untrusted pages
Crash dumps referencing out-of-bounds access in DevTools-related modules
Outbound connections from chrome.exe to attacker-controlled domains immediately following DevTools usage
Persistence artifacts or child process spawns originating from a Chrome renderer process

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any build below 136.0.7103.59
Monitor endpoint telemetry for anomalous child processes spawned by chrome.exe, particularly shells or scripting hosts
Alert on Chrome crash events tagged with heap corruption or access violation signatures
Correlate browsing telemetry with DevTools usage on uncategorized or newly registered domains

Monitoring Recommendations

Ingest browser crash reports and EDR process telemetry into a centralized analytics platform for retrospective hunting
Track Chrome version drift continuously and alert when endpoints fall behind the current Stable channel
Baseline normal DevTools usage in development populations to surface anomalies in non-developer user groups

How to Mitigate CVE-2025-4050

Immediate Actions Required

Update Google Chrome to version 136.0.7103.59 or later on all managed endpoints
Restart Chrome after the update to ensure the patched binary is loaded
Validate post-update version compliance through endpoint management or configuration tooling
Instruct users to avoid opening DevTools on untrusted or unfamiliar websites

Patch Information

Google released the fix in the Chrome Stable channel update announced on April 29, 2025. Details are published in the Google Chrome Update Announcement. Chromium-based browsers should apply equivalent patches from their respective vendors.

Workarounds

Disable or restrict DevTools usage via enterprise policy where developer access is not required
Enforce the DeveloperToolsAvailability Chrome policy to limit DevTools to extensions installed by policy
Apply browser isolation or remote browsing for users who routinely interact with untrusted content

bash

# Configuration example: enforce DevTools restriction via Chrome enterprise policy (Linux)
sudo mkdir -p /etc/opt/chrome/policies/managed
cat <<EOF | sudo tee /etc/opt/chrome/policies/managed/devtools.json
{
  "DeveloperToolsAvailability": 2
}
EOF
# Value 2 = DeveloperToolsDisallowed for all profiles