Spoofing Vulnerability in Microsoft Edge (Chromium-based) by Microsoft
CVE-2026-88078

4.3MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Edge (chromium-based)
Vendor
CVE Published:
29 October 2026

What is CVE-2026-88078?

An improper verification of cryptographic signatures in Microsoft Edge (Chromium-based) exposes users to the risk of spoofing attacks. An unauthorized actor may exploit this vulnerability to deceive users and perform malicious activities over a network without proper authentication, compromising data integrity and user trust.

Affected Version(s)

Microsoft Edge (Chromium-based) 1.0.0.0 < 156.0.4314.42

References

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

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.