Security Feature Bypass in Microsoft Edge by Microsoft
CVE-2026-70309

5.4MEDIUM

Key Information:

Vendor

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

What is CVE-2026-70309?

A security feature bypass vulnerability in Microsoft Edge (Chromium-based) arises due to origin validation errors, allowing unauthorized attackers to circumvent established security measures over a network. This flaw emphasizes the importance of secure coding practices and stringent validation processes in web applications to prevent unauthorized access and enhance overall security.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 150.0.4078.65

References

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

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.