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Homarr has a Race Condition in Invite Token Registration (TOCTOU)

Type: advisorySources: OSV

Homarr is an open-source dashboard. Prior to 1.57.0, the user registration endpoint (/api/trpc/user.register) is vulnerable to a race condition that allows an attacker to create multiple user accounts from a single-use invite token. The registration flow performs three sequential database operations without a transaction: CHECK, CREATE, and DELETE. Because these operations are not atomic, concurrent requests can all pass the validation step (1) before any of them reaches the deletion step (3). This allows multiple accounts to be registered using a single invite token that was intended to be single-use. This vulnerability is fixed in 1.57.0.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-32602
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 02:12 UTC · Revision 1

Source evidence

Homarr has a Race Condition in Invite Token Registration (TOCTOU)

core-osv · Original source

Published 6 Apr 2026, 14:42 UTC

Homarr is an open-source dashboard. Prior to 1.57.0, the user registration endpoint (/api/trpc/user.register) is vulnerable to a race condition that allows an attacker to create multiple user accounts from a single-use invite token. The registration flow performs three sequential database operations without a transaction: CHECK, CREATE, and DELETE. Because these operations are not atomic, concurrent requests can all pass the validation step (1) before any of them reaches the deletion step (3). This allows multiple accounts to be registered using a single invite token that was intended to be single-use. This vulnerability is fixed in 1.57.0.

osv:CVE-2026-32602
Complete source record
{
  "id": "fce5f1b021e1df387b21a40266eaabcafdff8ef5722bde04b3296db8ee77b7f0",
  "url": "https://osv.dev/vulnerability/CVE-2026-32602",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Homarr has a Race Condition in Invite Token Registration (TOCTOU)",
    "summary": "Homarr is an open-source dashboard. Prior to 1.57.0, the user registration endpoint (/api/trpc/user.register) is vulnerable to a race condition that allows an attacker to create multiple user accounts from a single-use invite token. The registration flow performs three sequential database operations without a transaction: CHECK, CREATE, and DELETE. Because these operations are not atomic, concurrent requests can all pass the validation step (1) before any of them reaches the deletion step (3). This allows multiple accounts to be registered using a single invite token that was intended to be single-use. This vulnerability is fixed in 1.57.0.",
    "evidence": "osv:CVE-2026-32602",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-32602",
      "aliases": [
        "CVE-2026-32602",
        "GHSA-vfw3-53q9-2hp8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/homarr-labs/homarr",
              "type": "GIT",
              "events": [
                {
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                },
                {
                  "fixed": "3d8e22574ec171634be1eb5bd9d1d90af87a2878"
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              "database_specific": {
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                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:homarr:homarr:*:*:*:*:*:*:*:*",
                    "range": [
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                    "source": "CPE_RANGE"
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          ],
          "versions": [
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32602.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.776142430Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32602.json",
        "https://github.com/homarr-labs/homarr/security/advisories/GHSA-vfw3-53q9-2hp8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32602"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-367"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32602.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-32602",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521676,
  "published_at": "2026-04-06T14:42:37.488+00:00"
}