Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-45494

CVE-2026-45494MEDIUM

Microsoft Edge (Chromium-based) Spoofing Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  C  L  L  N    6.1   .0030   21.4     —

AFFECTED
  Product                          Versions   Fixed
  Microsoft Edge (Chromium-based)  1.0.0.0 –  —

TIMELINE
  May 12  Reserved by microsoft
  May 18  Published (CNA: microsoft)
  Oct 14  RESCORED — CVE-2026-45494 (Microsoft Edge (Chromium-based)). CVSS 5.4 → 6.1 (NVD).

CWE-79 · CNA: microsoft · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 12, 2026	Reserved	Reserved by microsoft
May 18, 2026	Published	Published (CNA: microsoft)
October 14, 2026	RESCORED	RESCORED — CVE-2026-45494 (Microsoft Edge (Chromium-based)). CVSS 5.4 → 6.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Microsoft Edge (Chromium-based)	—	1.0.0.0	—

Weaknesses

CWE-79

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45494 [Vendor Advisory]

Authoritative record: CVE-2026-45494 at cve.org

Vendors: microsoft

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-45494 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.