CVE-2026-33700 MEDIUM

CVE-2026-33700: Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Project Link Share Deletion

Vendor Go-Vikunja
Product vikunja
Weakness CWE-639 · IDOR
Published March 24, 2026
Last update March 24, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 24, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2024-5619 IDOR in PruvaSoft Informatics' Apinizer Management Console CVE-2025-41097 Insecure Direct Object Reference in GPS BOLD Workplanner CVE-2025-49352 WordPress Order Cancellation & Returns for WooCommerce plugin <= 1.1.10 - Insecure Direct Object References (IDOR) vulnerability CVE-2026-30945 StudioCMS: IDOR — Arbitrary API Token Revocation Leading to Denial of Service CVE-2025-40660 Insecure Direct Object Reference (IDOR) vulnerability in DM Corporative CMS