Summary
Impact: Spoofing. Microsoft rating: Moderate. Not known to be exploited — Exploitation More Likely. Customer action: Required.
Details
According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L), and integrity (I:L) but lead to no loss of availability (A:N). What is the impact of this vulnerability?
The Edge browser's tab-splitting feature, which allows users to browse two tabs simultaneously, only displays the domain prefix in the address bars instead of the full URL. This behavior can lead to phishing vulnerabilities, as attackers could exploit it to make malicious websites appear legitimate by mimicking trusted domain names.
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
The user would have to open a web page that contained a malicious iframe.
What is the version information for this release?
148.0.3967.70: 148.0.3967.70, 05/15/2026: 05/15/2026, 148.0.7778.168: 148.0.7778.168
Security updates
148.0.3967.70 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
Vulnerabilities 1
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Medium 5.4
Microsoft Edge (Chromium-based) Spoofing Vulnerability
Microsoft Edge (Chromium-based) Spoofing Vulnerability
Revision history
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#2
Acknowledgement added. This is an informational change only.
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#1
Information published.
References
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CVE-2026-45494 Microsoft Edge (Chromium-based) Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45494
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss