What is CVE-2026-58597?

CVE-2026-58597 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-357. CVSS score: 4.3/10. Published 2026-07-03.

How severe is CVE-2026-58597?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Microsoft Edge Chromium

CVE-2026-58597

Insufficient ui warning of dangerous operations in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Published 2026-07-03 · last modified 2026-07-06.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.7th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Microsoft Edge Chromium
Microsoft Edge (Chromium-Based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-357

References

Microsoft Edge (Chromium-based) Spoofing Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-58597?: CVE-2026-58597 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-357. CVSS score: 4.3/10. Published 2026-07-03.
How severe is CVE-2026-58597?: Medium severity. CVSS v3 base score is 4.3 out of 10.