Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the migration helper functions `DownloadFile` and `DownloadFileWithHeaders` in `pkg/modules/migration/helpers.go` make arbitrary HTTP GET requests without any SSRF protection. When a user triggers a Todoist or Trello migration, file attachment URLs from the third-party API response are passed directly to these functions, allowing an attacker to force the Vikunja server to fetch internal network resources and return the response as a downloadable task attachment. Version 2.2.1 patches the issue.
Use CWE-918, Vikunja vendor hub and Vikunja product page to widen CVE-2026-33675 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-35595, CVE-2026-34727 and CVE-2026-33700 for nearby disclosures in the same product family.