InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover

{
  "id": "cf9bb4c8c2e15eb458a7543036c84fc58dbebe28d61ca9a46d16ab7c12726e65",
  "url": "https://osv.dev/vulnerability/CVE-2026-55610",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover",
    "summary": "InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.1, in InvoiceShelf's multi-company installations, any user who is an Owner of one company can read and overwrite any user account in any other company on the same installation. `GET/PUT /api/v1/users/{user}` resolves the target `User` by global primary key, and `UserPolicy` checks only that the requester owns their own header-company — it never verifies that the target user belongs to that company. This allows cross-tenant disclosure of user data and full account takeover (email/password overwrite + company re-assignment). Version 2.4.1 fixes the issue.",
    "evidence": "osv:CVE-2026-55610",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-55610",
      "aliases": [
        "CVE-2026-55610",
        "GHSA-vgx6-6cqr-m8qr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/invoiceshelf/invoiceshelf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "cc21c7d4e5626d7d8ee153a7448e0cbe16964c71"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.4.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.4.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0",
            "2.3.3",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.1",
            "2.2.0",
            "2.1.1",
            "2.1.0",
            "2.1.0-RC1",
            "2.0.0",
            "2.0.0-RC1",
            "1.3.0",
            "1.2.2",
            "1.2.1",
            "1.2.0",
            "1.1.0",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55610.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.891829219Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55610.json",
        "https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-vgx6-6cqr-m8qr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-55610"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55610.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-55610",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491500,
  "published_at": "2026-09-23T14:38:07.581+00:00"
}