---
id: CVE-2026-111921
title: Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
summary: >-
  Vikunja 0.13.0 before 2.7.0 contains an incorrect authorization vulnerability
  that allows project members with Write permission to delete admin-tier link
  shares because the delete permission check reads an unloaded share object.
  Attacker…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-863
vendor: go-vikunja
product: vikunja
affected:
  - vikunja >= 0.13.0 < 2.7.0
published: '2026-10-17'
updated: '2026-10-17'
sourceUpdated: '2026-10-17T18:46:35.329Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111921'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327
    label: GitHub Security Advisory (GHSA-fmmf-xq98-g327)
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-0.13.0-before-2.7.0-incorrect-authorization-in-link-share-deletion
    label: >-
      VulnCheck Advisory: Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in
      Link Share Deletion
tags:
  - cve.org
ingestedAt: '2026-10-17T19:08:56.619Z'
---

## Overview

Vikunja 0.13.0 before 2.7.0 contains an incorrect authorization vulnerability that allows project members with Write permission to delete admin-tier link shares because the delete permission check reads an unloaded share object. Attackers can send DELETE requests to the v1 or v2 projects shares endpoints with sequential share IDs to revoke admin links and invalidate existing share sessions.

## Affected

- `vikunja >= 0.13.0 < 2.7.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.