What is CVE-2026-33678?

CVE-2026-33678 is a high-severity vulnerability in Go-vikunja Vikunja, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-03-24.

How severe is CVE-2026-33678?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Go-vikunja Vikunja

CVE-2026-33678

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()`…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (18.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Go-vikunja Vikunja — versions < 2.2.1
Vikunja

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-33678?: CVE-2026-33678 is a high-severity vulnerability in Go-vikunja Vikunja, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-03-24.
How severe is CVE-2026-33678?: High severity. CVSS v3 base score is 8.1 out of 10.