CVE-2026-55065
Authenticated API flaw allows cross-tenant deletion of Kanban assignments in Vikunja
Is CVE-2026-55065 being exploited?
Not confirmed. CVE-2026-55065 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-55065?
CVE-2026-55065 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55065?
Yes. A fix has been recorded for CVE-2026-55065. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55065 affect?
CVE-2026-55065 affects Vikunja versions 0.24.6 through 2.3.x (fixed in 2.4.0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55065?
Upgrade Vikunja to 2.4.0 immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can delete another project's task_buckets and task_positions, destroying Kanban assignments and ordering (cross-tenant data destruction).
Immediate action required
- affected>= 0.24.6 and < 2.4.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.