We use optional cookies to improve your experience on our websites, such as through social media connections, and to display personalized advertising based on your online activity. If you reject optional cookies, only cookies necessary to provide you the services will be used. You may change your selection by clicking “Manage Cookies” at the bottom of the page. Privacy Statement Third-Party Cookies AcceptRejectManage cookies MSRC  Customer Guidance  Security Update Guide  Vulnerabilities  CVE-2026-45494 Microsoft Edge (Chromium-based) Spoofing Vulnerability NewRecently updated On this page  CVE-2026-45494  Subscribe RSS PowerShell  API  CSAF Security Vulnerability Released: May 15, 2026 Last updated: Jun 1, 2026 Assigning CNA Microsoft CVE.org link CVE-2026-45494  Impact Spoofing Max Severity Moderate Weakness CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CVSS Source Microsoft Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C Metrics CVSS:3.1 5.4 / 4.7  Base score metrics: 5.4 / Temporal score metrics: 4.7  Expand all  Collapse all Metric Value   Base score metrics(8) Attack Vector Network Attack Complexity Low Privileges Required None User Interaction Required Scope Unchanged Confidentiality Low Integrity Low Availability None   Temporal score metrics(3) Exploit Code Maturity Unproven Remediation Level Official Fix Report Confidence Confirmed Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Exploitability The following table provides an exploitability assessment for this vulnerability at the time of original publication. Publicly disclosed No Exploited No Exploitability assessment Exploitation More Likely FAQ 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? Microsoft Edge Version Date Released Based on Chromium Version 148.0.3967.70 05/15/2026 148.0.7778.168 Acknowledgements Orange Tsai (@orange_8361) of DEVCORE Research Team (@d3vc0r3) working with TrendAI Zero Day Initiative Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information. Security Updates To determine the support lifecycle for your software, see the Microsoft Support Lifecycle. Release date Descending  Edit columns  Download  Filters  Product Family  Max Severity  Impact  Platform   Clear Release date  Product Platform Impact Max Severity Article Download Build Number Assigning CNA Loading... Disclaimer The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Revisions version revisionDate description 1.1 Jun 1, 2026 Acknowledgement added. This is an informational change only. 1.0 May 15, 2026 Information published.  How satisfied are you with the MSRC Security Update Guide? Rating  Broken  Bad  Below average  Average  Great!  Your Privacy Choices Consumer Health Privacy