CVE-2026-34460: Namelessmc Nameless

Medium severity, CVSS 5.4. EPSS: 0.1% chance of exploitation in the next 30 days.

NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim's browser to navigate to it, resulting in the victim's session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5.

Affected products

• Namelessmc Nameless: before 2.2.5 (fixed in 2.2.5)

Published 2026-06-02. Last modified 2026-07-22.