Read-only Vikunja users can delete project background images via broken object-level authorization

{
  "id": "a9a41926fc958e682866f446dede1ab7af442cae32c50b5ca4c3e4d4ba272046",
  "url": "https://osv.dev/vulnerability/CVE-2026-33312",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Read-only Vikunja users can delete project background images via broken object-level authorization",
    "summary": "Vikunja is an open-source self-hosted task management platform. Starting in version 0.20.2 and prior to version 2.2.0, the `DELETE /api/v1/projects/:project/background` endpoint checks `CanRead` permission instead of `CanUpdate`, allowing any user with read-only access to a project to permanently delete its background image. Version 2.2.0 fixes the issue.",
    "evidence": "osv:CVE-2026-33312",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-33312",
      "aliases": [
        "CVE-2026-33312",
        "GHSA-564f-wx8x-878h",
        "GO-2026-4795"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/go-vikunja/vikunja",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6259dd8d42fd095a63623ffa3f23e2250e737b3f"
                },
                {
                  "fixed": "b365be1881641dd2791d3dff4c26ad941c13cef6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.20.2"
                      },
                      {
                        "fixed": "2.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.20.2"
                      },
                      {
                        "fixed": "2.2.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33312.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.164047851Z",
      "provider": "osv",
      "references": [
        "https://vikunja.io/changelog/vikunja-v2.2.0-was-released",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33312.json",
        "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-564f-wx8x-878h",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33312"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33312.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-33312",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510908,
  "published_at": "2026-03-20T14:42:14.137+00:00"
}