Is CVE-2026-57458 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-57458?

CVE-2026-57458 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-57458

Description

Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the `oauth.authorize` permission can call `POST /api/v1/oauth/authorize`, obtain an OAuth authorization code, and exchange the code at `POST /api/v1/oauth/token` for a normal bearer JSON Web Token (JWT) and refresh token. The resulting credentials are not restricted by the original API token's permissions, allowing access to routes outside its declared scope for the same user. Version 2.4.0 fixes the vulnerability.