Is CVE-2026-66853 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66853?

CVE-2026-66853 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-66853

Description

Gitea's user organization-list API includes Limited-visibility organizations for authenticated restricted accounts without applying the visibility restriction enforced by the single-organization endpoint. A restricted user can list a known user's public organization memberships and retrieve limited organizations' names, descriptions, and avatars. This exposes organization metadata that should be hidden from the requesting account.