Microsoft has released a new Microsoft Edge update (version 144.0.3719.115) that fixes a serious performance bug on macOS and patches a newly disclosed security vulnerability on Android. The update rolled out on February 5, 2026, and addresses two issues that users have widely reported in recent weeks.
macOS High CPU Usage Bug Finally Fixed
The most notable fix targets a macOS issue that caused Microsoft Edge to fully saturate a CPU core under certain conditions. Many Mac users reported that Edge consumed 100% CPU even with a single tab open, leading to loud fan noise, rapid battery drain, and overheating—especially on Apple Silicon Macs.
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Microsoft confirms that this bug has now been fixed in the latest stable release. The issue appeared more frequently in Edge 144 builds and often persisted even after disabling extensions or creating fresh browser profiles. With this update, Edge should now return to normal CPU behavior on macOS systems.
Android Spoofing Vulnerability Patched (CVE-2026-0391)
The update also patches a moderate-severity Android security flaw, tracked as CVE-2026-0391. The vulnerability allowed UI spoofing over a network, where attackers could misrepresent critical browser interface elements and potentially trick users.
Key details of the vulnerability:
- Impact: Spoofing
- Attack Vector: Network-based
- User Interaction: Not required
- Severity: Moderate (CVSS 3.1 score up to 6.5)
- Risk: High confidentiality exposure, limited integrity impact
Microsoft states that exploitation is unlikely due to high attack complexity, but confirms that the issue has been fully patched with an official fix in this release.
What macOS Users Should Do to Fix Microsoft Edge High CPU Usage
- macOS users: Update Edge immediately if you noticed high CPU usage or battery drain.
- Android users: Install the latest Edge update to stay protected against UI spoofing attacks.
- All users: Keep automatic updates enabled to receive future security and stability fixes without delay.
The latest Microsoft Edge update delivers an important macOS performance fix that resolves high CPU usage and related battery issues. Users affected by Edge 144 builds should install the update as soon as possible to restore normal system behavior.
