What is CVE-2018-8512?

CVE-2018-8512 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2018-10-10.

How severe is CVE-2018-8512?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Improper input validation in Microsoft Edge

CVE-2018-8512

A security feature bypass vulnerability exists in Microsoft Edge when the Edge Content Security Policy (CSP) fails to properly validate certain specially crafted documents, aka "Microsoft Edge Security Feature Bypass Vulnerability." This affects Microsoft Edge. This CVE ID is unique from CVE-2018-8530.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-10-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.035 (88.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000

Affected products

Microsoft Edge
Microsoft Edge — versions Windows 10 Version 1703 for 32-bit Systems, Windows 10 Version 1703 for x64-based Systems, Windows 10 Version 1709 for 32-bit Systems
Microsoft Windows 10 — versions 1703, 1709

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8512 (Patch, Vendor Advisory)
www.securityfocus.com/bid/105486 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1041825 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-8512?: CVE-2018-8512 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2018-10-10.
How severe is CVE-2018-8512?: Medium severity. CVSS v3 base score is 5.4 out of 10.