CVE-2026-79074 Overview
CVE-2026-79074 is an information disclosure vulnerability in the Network component of Google Chrome. The flaw affects Chrome versions prior to 152.0.7977.65. A remote attacker who has already compromised the renderer process can leak sensitive information by delivering a crafted HTML page to the victim. Google classifies the Chromium security severity as Medium. The weakness maps to CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Critical Impact
An attacker with an already-compromised renderer can exfiltrate sensitive data from the browser network stack, bypassing site isolation boundaries when a user interacts with a crafted page.
Affected Products
- Google Chrome for Desktop prior to 152.0.7977.65
- Chromium-based browsers incorporating the pre-patch Network component
- Downstream distributions that had not yet integrated the Chrome 152 stable release
Discovery Timeline
- 2026-08-25 - CVE-2026-79074 published to NVD
- 2026-08-26 - Last updated in NVD database
Technical Details for CVE-2026-79074
Vulnerability Analysis
The vulnerability resides in the Network component of the Chromium browser engine. It permits an attacker who has already achieved code execution inside the renderer process to obtain data that should remain isolated from that process. The renderer sandbox is designed to constrain what a compromised tab can read from the wider browser, including cross-origin network responses and other privileged network state. This flaw weakens that boundary and enables data leakage through a crafted HTML page.
Exploitation requires user interaction, such as visiting an attacker-controlled or attacker-influenced site. The attack chain assumes a prior renderer compromise, so this issue is typically chained with a separate memory-corruption or logic bug that yields renderer control. Successful exploitation results in confidentiality impact only; integrity and availability are not affected.
Root Cause
The root cause is improper isolation of sensitive data within the Network component, categorized under CWE-200. Data that should be inaccessible to a renderer is reachable through crafted network interactions. Public Chromium tracker entry Issue #513745793 references the internal fix, though full technical details remain restricted pending broader patch uptake.
Attack Vector
The attack is network-based and requires two conditions. First, the attacker must have compromised the renderer process, typically via a prior exploit. Second, the victim must load a crafted HTML page under attacker influence. Once both conditions are met, the attacker uses the compromised renderer to trigger the flawed network code path and read sensitive information back through the renderer.
No verified public exploit code is available. See the Chrome Stable Channel Update for the vendor description.
Detection Methods for CVE-2026-79074
Indicators of Compromise
- Chrome browser processes running versions earlier than 152.0.7977.65 in enterprise inventories
- Renderer processes making unexpected cross-origin network requests followed by outbound data transfers to untrusted domains
- Endpoint telemetry showing renderer processes spawning after visits to unfamiliar sites hosting obfuscated JavaScript
Detection Strategies
- Inventory installed Chrome versions across managed endpoints and flag any host below 152.0.7977.65
- Correlate browser process telemetry with DNS and HTTP egress to identify anomalous data exfiltration patterns from renderer children
- Hunt for chained renderer exploitation by looking for browser crashes or sandbox escapes preceding suspicious network activity
Monitoring Recommendations
- Ingest browser version and update-status data into your SIEM or data lake for continuous compliance tracking
- Alert on Chrome processes performing bulk outbound transfers to newly observed domains shortly after page navigation events
- Monitor for known malicious ad networks and drive-by delivery infrastructure that may host crafted HTML payloads
How to Mitigate CVE-2026-79074
Immediate Actions Required
- Update Google Chrome to 152.0.7977.65 or later on all managed endpoints
- Force browser restart through management tooling to ensure the patched binary is loaded into memory
- Verify Chromium-based derivatives such as Edge, Brave, and Opera have absorbed the upstream fix
Patch Information
Google addressed CVE-2026-79074 in the Chrome Stable Channel release 152.0.7977.65 for Desktop. Details are documented in the Chrome Stable Channel Update for Desktop. Enterprise administrators should push the update via Google Update, Chrome Browser Cloud Management, or their standard software distribution channel.
Workarounds
- Restrict browsing to trusted sites through URL allowlisting until patching is complete
- Enforce site isolation and disable unnecessary browser extensions that expand attack surface in the renderer
- Apply network egress filtering to reduce the value of a successful information leak
# Verify installed Chrome version on Windows endpoints
reg query "HKLM\SOFTWARE\Google\Chrome\BLBeacon" /v version
# 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
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
