CVE-2026-91983
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
Sep 15, 2026
Vendor
unknown
Description
Vikunja before 2.6.0 contains an API token scope bypass vulnerability in task read endpoints where authorization fails to inspect query string parameters. Attackers with limited token scopes can use the expand parameter to access restricted data like comments, reactions, and time entries without proper permission verification.