Privilege escalation in Go-Vikunja Vikunja
CVE-2026-57458
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.
Vulnerability class: Privilege Escalation
Published .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Go-Vikunja Vikunja — versions = 2.3.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-57458?
- CVE-2026-57458 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Privilege Management. CVSS score: 8.1/10. Published 2026-10-09.
- How severe is CVE-2026-57458?
- High severity. CVSS v3 base score is 8.1 out of 10.