CVE-2026-108752 JupyterHub through 6.0.1 OAuth Client ID Collision via Unescaped Hyphen

JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth client by registering a hyphenated username. Attackers holding a name like alice-prod can overwrite the client for alice's server prod, breaking...