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Vulnerability record · CVE-2018-8278 · published 11 July 2018

CVE-2018-8278: Microsoft edge authentication bypass by spoofing vulnerability

Microsoft · Edge

A spoofing vulnerability exists when Microsoft Edge improperly handles specific HTML content, aka "Microsoft Edge Spoofing Vulnerability." This affects Microsoft Edge.

6.1 CVSS 3.0 Medium EPSS 6.9% · top 6.1% CWE-290 · Authentication bypass by spoofing
6.1CVSS 3.0 base score, v2 5.8
6.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A spoofing vulnerability exists when Microsoft Edge improperly handles specific HTML content, aka "Microsoft Edge Spoofing Vulnerability." This affects Microsoft Edge.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/104627 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041255 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8278 PatchVendor Advisory
http://www.securityfocus.com/bid/104627 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041255 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8278 PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-8278), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.