CVE-2026-91969: Go-Vikunja Vikunja

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the POST /api/v2/migration/csv/migrate endpoint that fails to limit parsed row cardinality. Authenticated attackers can upload multipart CSV files with millions of tiny records to exhaust process memory and terminate the API service.

Affected products

• Go-Vikunja Vikunja: from 2.5.0, before 2.6.0 (fixed in 2.6.0)

Published 2026-09-15. Last modified 2026-09-17.