CVE-2026-33678 — Authorization Bypass Through User-Controlled Key in Vikunja
Severity
8.1HIGHNVD
EPSS
0.0%
top 90.49%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 24
Latest updateMar 26
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 accessibl…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NExploitability: 2.8 | Impact: 5.2
Affected Packages3 packages
🔴Vulnerability Details
3OSV▶
Vikjuna: IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion in code.vikunja.io/api↗2026-03-26
GHSA
▶
OSV
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