Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, `TaskAttachment.ReadOne()` queries attachments by ID only (`WHERE id = ?`), ignoring the task ID from the URL path. The permission check in `CanRead()` validates access to the task specified in the URL, but `ReadOne()` loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the system by providing their own accessible task ID with a target attachment ID. Attachment IDs are sequential integers, making enumeration trivial. Version 2.2.1 patches the issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vikunja | Vikunja | < 2.2.1 |
Related Weaknesses (CWE)
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-jfmm-mjcp-8wq2ExploitVendor Advisory
- https://vikunja.io/changelog/vikunja-v2.2.2-was-releasedRelease Notes
FAQ
What is CVE-2026-33678?
CVE-2026-33678 is a vulnerability with a CVSS score of 8.1 (HIGH). Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, `TaskAttachment.ReadOne()` queries attachments by ID only (`WHERE id = ?`), ignoring the task ID from the URL pa...
How severe is CVE-2026-33678?
CVE-2026-33678 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33678?
Check the references section above for vendor advisories and patch information. Affected products include: Vikunja Vikunja.