CVE-2026-91983

MediumCVSS 4.3/10Last modified Sep 16, 2026

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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-863

Affected software

No affected versions have been published.

Timeline

Published: Sep 15, 2026
Last modified: Sep 16, 2026
NVD status: Deferred

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