XSS in Microsoft Edge Chromium

CVE-2026-45494

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-45494: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45494?
CVE-2026-45494 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-18.
How severe is CVE-2026-45494?
Medium severity. CVSS v3 base score is 5.4 out of 10.