CVE-2026-33678HIGH 8.1EPSS p17.7%

CVE-2026-33678CVE-2026-33678

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS0.27% probability of exploitation · percentile 17.7% · 2026-06-19T12:03:05Z
Published2026-03-24
Last modified2026-03-30

Underlying weaknesses· 1

CWE-639

References

  1. https://github.com/go-vikunja/vikunja/security/advisories/GHSA-jfmm-mjcp-8wq2
  2. https://vikunja.io/changelog/vikunja-v2.2.2-was-released

1

TypeTargetConfidenceTier
WeaknessAuthorization Bypass Through User-Controlled Keycwe-6390%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-33668
CVE
CVE-2026-35595
CVE
CVE-2026-28268
CVE
CVE-2026-33316
CVE
CVE-2026-27575
CVE
CVE-2026-33335
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.