Microsoft Edge Addresses Chromium CVE-2026-106389: Incorrect Authorization

Microsoft Edge (Chromium-based) will address a recently disclosed Chromium vulnerability, CVE-2026-106389, which involves incorrect authorization handling.

What Happened

The flaw allows an attacker to bypass normal authorization checks within the Chromium engine, potentially granting elevated privileges to malicious content.

Impact

Any system running an affected version of Microsoft Edge or other Chromium‑based browsers may be susceptible until the patch is applied. The vulnerability could be leveraged to execute privileged code or access protected resources.

What to Do

• Verify the current Edge version on all endpoints. The fix is included in the latest Chromium release cycle.
• Apply the most recent Microsoft Edge update as soon as it becomes available.
• Monitor authentication logs for anomalous activity that might indicate exploitation attempts.
• Consider temporarily disabling features that rely on the affected authorization path if immediate patching is not possible.

Microsoft recommends keeping browsers up to date to mitigate this issue.