CVE-2026-33678

HIGH

8.1

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/24/2026

Last Modified3/30/2026

Sourcenvd

Honeypot Sightings0

Affected Products

vikunja:vikunja

Weaknesses (CWE)

CWE-639

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-jfmm-mjcp-8wq2(security-advisories@github.com)

https://vikunja.io/changelog/vikunja-v2.2.2-was-released(security-advisories@github.com)

IOC Correlations

No correlations recorded

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