CVE-2026-40103

Summary

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.

Affected Software

VendorProductVersion RangeStatus
go-vikunjavikunja< 2.3.0affected

Weaknesses

  • CWE-836: CWE-836: Use of Password Hash Instead of Password for Authentication

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

References