CVE-2026-123518
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
Nov 08, 2026
Vendor
unknown
Description
Vikunja before 2.7.1 contains an incorrect authorization vulnerability in TaskBucket.CanUpdate, which checks write access to the bucket's project and to the task separately but never verifies that both belong to the same project. Authenticated users with write access to two projects can move a task into another project's kanban bucket. This persists cross-project task_buckets rows that count toward bucket limits and, for done buckets, toggle the task's done state.