Is CVE-2026-108752 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-108752?

CVE-2026-108752 has a CVSS v3 severity of MEDIUM (4.2).

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CVE-2026-108752

Description

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 OAuth login and revoking tokens by stopping their own server.