CVE-2026-57978
Received Received - Intake

Microsoft Edge Spoofing Vulnerability via Origin Validation Error

Publication date: 2026-07-26

Last updated on: 2026-07-26

Assigner: Microsoft Corporation

Description
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-26
Last Modified
2026-07-26
Generated
2026-07-27
AI Q&A
2026-07-26
EPSS Evaluated
N/A
NVD
CVE-2026-57978
EUVD
EUVD-2026-49057

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft edge to 2026-57978 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an origin validation error in Microsoft Edge (Chromium-based) that allows an unauthorized attacker to perform spoofing over a network. Spoofing involves tricking users into believing they are interacting with a legitimate source when they are not.

Impact Analysis

An attacker could exploit this to impersonate a trusted website or service, potentially leading to phishing attacks, unauthorized data access, or misleading users into performing actions they otherwise wouldn't.

Compliance Impact

This vulnerability allows spoofing attacks, which could lead to unauthorized access or data exposure. Such risks may impact compliance with GDPR (data protection) and HIPAA (health data security) by enabling unauthorized access to sensitive information.

Mitigation Strategies

Update Microsoft Edge to the latest version immediately to patch the origin validation error. Monitor Microsoft's official security updates for additional guidance.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-57978. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart