Information Disclosure Vulnerability in Microsoft Edge (Chromium) by Microsoft
CVE-2026-66318

8.1HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Edge (chromium-based)
Vendor
CVE Published:
3 August 2026

What is CVE-2026-66318?

An origin validation error in Microsoft Edge (Chromium-based) allows unauthorized attackers to exploit the vulnerability to disclose sensitive information over a network. Implementing the appropriate security patches is essential for protecting against potential attacks that could misuse this flaw. It's crucial for users to keep their browsers updated and comply with security best practices to mitigate risks.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 151.0.4129.59

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.