CVE-2018-12270: Valvesoftware Steam Client

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

In Valve Steam 1528829181 BETA, it is possible to perform a homograph / homoglyph attack to create fake URLs in the client, which may trick users into visiting unintended web sites.

Affected products

Published 2019-05-20. Last modified 2026-06-17.