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GHSA-MGH9-4MWP-FG55

Vulnerability from github – Published: 2025-08-18 21:00 – Updated: 2025-08-29 20:35
VLAI
Summary
OpenFGA Authorization Bypass
Details

Overview

OpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 <= Helm chart <= openfga-0.2.41, v1.9.3 <= docker <= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed.

Am I Affected?

You are affected by this vulnerability if you are using OpenFGA v1.9.3 to v1.9.4, specifically under the following preconditions: - Calling Check API or ListObjects with an authorization model that has a relationship directly assignable by more than 1 userset with same type, and - There are check or list object queries that rely on the above relationship, and - You have userset tuples that are assigned to the above relationship

Fix

Upgrade to v1.9.5. This upgrade is backwards compatible.

Workaround

Downgrade to v1.9.2 with enable-check-optimizations removed from OPENFGA_EXPERIMENTALS

Acknowledgments

OpenFGA would like Dominic Harries and rrozza-apolitical to thank for discovering this vulnerability.

Severity
5.8 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openfga/openfga"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.3"
            },
            {
              "fixed": "1.9.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-55213"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-18T21:00:52Z",
    "nvd_published_at": "2025-08-18T20:15:29Z",
    "severity": "MODERATE"
  },
  "details": "### Overview\nOpenFGA v1.9.3 to v1.9.4 ( openfga-0.2.40 \u003c= Helm chart \u003c= openfga-0.2.41, v1.9.3 \u003c= docker \u003c= v.1.9.4) are vulnerable to improper policy enforcement when certain Check and ListObject calls are executed.\n\n### Am I Affected?\nYou are affected by this vulnerability if you are using OpenFGA v1.9.3 to v1.9.4, specifically under the following preconditions:\n- Calling Check API or ListObjects with an [authorization model](https://openfga.dev/docs/concepts#what-is-an-authorization-model) that has a relationship directly assignable by more than 1 [userset](https://openfga.dev/docs/modeling/building-blocks/usersets) with same [type](https://openfga.dev/docs/concepts#what-is-a-type), and\n- There are check or list object queries that rely on the above relationship, and\n- You have userset tuples that are assigned to the above relationship\n\n\n### Fix\nUpgrade to v1.9.5. This upgrade is backwards compatible.\n\n### Workaround\nDowngrade to v1.9.2 with enable-check-optimizations removed from OPENFGA_EXPERIMENTALS\n\n### Acknowledgments\nOpenFGA would like Dominic Harries and rrozza-apolitical to thank for discovering this vulnerability.",
  "id": "GHSA-mgh9-4mwp-fg55",
  "modified": "2025-08-29T20:35:56Z",
  "published": "2025-08-18T21:00:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/security/advisories/GHSA-mgh9-4mwp-fg55"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55213"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/commit/1a7e0e37fc4777c824b2386cac4867a66f3480b0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openfga/openfga"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-3894"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenFGA Authorization Bypass "
}



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