Auth bypass in Go-Vikunja Vikunja
CVE-2026-33313
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, an authenticated user can read any task comment by ID, regardless of whether they have access to the task the comment belongs to, by substituting the task ID in the API URL with a task they do have access to. Version 2.2.0 fixes the issue.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Go-vikunja Vikunja — versions < 2.2.0
- Vikunja
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-33313?
- CVE-2026-33313 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-03-24.
- How severe is CVE-2026-33313?
- Medium severity. CVSS v3 base score is 4.3 out of 10.