Auth bypass in Go-Vikunja Vikunja
CVE-2026-123522
Vikunja before 2.7.1 contains an authorization bypass vulnerability that allows authenticated users to read any task by injecting a crafted task object into a no-op Kanban bucket move. Attackers can set task.id to a victim task and task.project_id to their own project, routing full task contents to their webhook and forging mention notifications.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/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
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-5q33-h98p-rgh9) (vendor-advisory)
- VulnCheck Advisory: Vikunja before 2.7.1 Task Information Disclosure via Kanban Bucket Move Webhook (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123522?
- CVE-2026-123522 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-11-08.
- How severe is CVE-2026-123522?
- High severity. CVSS v3 base score is 7.1 out of 10.