CVE-2026-91968 [MEDIUM] – vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the task-filt

vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the task-filter endpoint that accepts deeply nested filter expressions without recursion depth limits. Authenticated attackers can supply thousands of nested parentheses in the filter query parameter to exhaust memory and terminate the API process.