CVE-2026-66318: Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Other sources
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 151.0.4129.59
Event History
Frequently Asked Questions
What is the severity of CVE-2026-66318?
The severity of CVE-2026-66318 is rated as high with a score of 8.1.
How do I fix CVE-2026-66318?
To fix CVE-2026-66318, ensure that Microsoft Edge (Chromium-based) is updated to the latest version as released by Microsoft.
What type of vulnerability is CVE-2026-66318?
CVE-2026-66318 is classified as an Information Disclosure Vulnerability.
What can an attacker do with CVE-2026-66318?
An unauthorized attacker can exploit CVE-2026-66318 to disclose sensitive information over a network.
Is CVE-2026-66318 applicable to all users of Microsoft Edge?
Yes, CVE-2026-66318 affects all users of Microsoft Edge (Chromium-based) if not mitigated by applying the necessary updates.