CVE-2026-7922: Google Chrome Use After Free Vulnerability

CVE-2026-7922 Overview

CVE-2026-7922 is a use-after-free vulnerability [CWE-416] in the ServiceWorker component of Google Chrome before version 148.0.7778.96. A remote attacker can trigger the flaw by serving a crafted HTML page to a victim, leading to a potential sandbox escape. Google classifies the Chromium security severity as High. The issue affects Chrome on Windows, macOS, and Linux desktop platforms. Exploitation requires user interaction, such as visiting an attacker-controlled site, and abuses the renderer process to break out of the browser sandbox boundary.

Critical Impact

Successful exploitation allows a remote attacker to escape the Chrome sandbox through a crafted web page, enabling code execution with broader privileges on the host system.

Affected Products

• Google Chrome prior to 148.0.7778.96
• Microsoft Windows desktop installations of Chrome
• Apple macOS and Linux desktop installations of Chrome

Discovery Timeline

• 2026-05-06 - CVE-2026-7922 published to NVD
• 2026-05-06 - Last updated in NVD database

Technical Details for CVE-2026-7922

Vulnerability Analysis

The flaw resides in the ServiceWorker subsystem of Chromium, which manages background scripts that intercept network requests, handle push notifications, and enable offline functionality. A use-after-free condition occurs when code accesses a heap object after that object has been released. In ServiceWorker, lifecycle transitions between registration, activation, and termination create complex object ownership patterns that can desynchronize references.

An attacker crafts an HTML page that drives the ServiceWorker through a specific sequence of state changes. The page forces release of an internal object while another code path still holds a dangling pointer. Subsequent use of that pointer reads or writes freed memory. With heap grooming, the attacker places controlled data into the reclaimed allocation and hijacks control flow inside the renderer process.

The vulnerability is rated with an EPSS probability of 0.068% at the 20.93 percentile, and no public proof-of-concept is currently available.

Root Cause

The root cause is improper lifetime management of a ServiceWorker-related object on the heap. References to the object persist beyond its deallocation, violating memory-safety invariants enforced elsewhere in Blink and the Chromium content layer.

Attack Vector

Delivery occurs over the network through a crafted HTML page. The victim must load the page in a vulnerable Chrome build, which satisfies the user-interaction requirement. Once the renderer parses the page and registers the malicious ServiceWorker, the attacker triggers the use-after-free and chains it with additional primitives to attempt a sandbox escape.

No verified exploit code is publicly available. See the Chromium Issue Tracker Entry for additional technical context once the entry is unrestricted.

Detection Methods for CVE-2026-7922

Indicators of Compromise

• Chrome renderer or GPU process crashes referencing ServiceWorker, content::ServiceWorkerVersion, or blink::ServiceWorkerGlobalScope in crash dumps
• Unexpected child processes spawned by chrome.exe, Google Chrome Helper, or chrome on Linux following a browsing session
• Outbound connections to unfamiliar domains immediately after a user visits a new site, suggesting post-exploitation activity

Detection Strategies

• Inventory Chrome versions across managed endpoints and flag any installation below 148.0.7778.96
• Monitor process creation telemetry for anomalous children of the Chrome renderer, including shells, scripting hosts, or LOLBins
• Correlate browser crash events with subsequent file writes to user-writable directories such as %APPDATA%, ~/Library, or /tmp

Monitoring Recommendations

• Forward Chrome crash reporter output and EDR process telemetry into a central data lake for retrospective hunting
• Alert on ServiceWorker registrations from newly observed domains in enterprise web proxy logs
• Track endpoints that revisit suspicious URLs flagged by threat intelligence feeds after browser exploitation campaigns

How to Mitigate CVE-2026-7922

Immediate Actions Required

• Update Google Chrome to version 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints
• Restart browser sessions after deployment to ensure the patched binary is loaded
• Audit Chromium-based applications and embedded WebViews that may bundle vulnerable Blink builds

Patch Information

Google released the fix in the Stable channel update documented in the Google Chrome Stable Update advisory. Administrators should push the update through enterprise management policies such as Chrome Browser Cloud Management, Microsoft Intune, Jamf, or Linux package repositories.

Workarounds

• Restrict browsing to trusted sites using enterprise web filtering until patching completes
• Disable ServiceWorker for untrusted origins through Chrome enterprise policies where feasible
• Apply site isolation and strict same-origin enforcement to limit renderer compromise impact

# Verify installed Chrome version on Windows, macOS, and Linux
# Windows (PowerShell)
(Get-Item "$env:ProgramFiles\Google\Chrome\Application\chrome.exe").VersionInfo.ProductVersion

# macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Linux
google-chrome --version

# Expected output: 148.0.7778.96 or later