Vulnerability-Lookup

GHSA-CF98-J28V-49V6

Vulnerability from github – Published: 2026-06-18 15:05 – Updated: 2026-06-18 15:05

Summary

OpenFGA Improper Policy Enforcement

Details

Description

In OpenFGA, when MySQL is being used as the datastore, two distinct check requests can return the same response.

Preconditions

This applies if the following preconditions are met:

You run OpenFGA with MySQL as the datastore
Your authorization decisions rely on case-sensitive user strings.

Fix

Upgrade to OpenFGA 1.18.0 or greater.

Acknowledgements

OpenFGA would like to thank @sahajamoth for the detailed report.

Severity

2.1 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openfga/openfga"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55170"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-178"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-18T15:05:30Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "## Description\n\nIn OpenFGA, when MySQL is being used as the datastore, two distinct check requests can return the same response.\n\n## Preconditions\n\nThis applies if the following preconditions are met:\n\n1. You run OpenFGA with MySQL as the datastore\n2. Your authorization decisions rely on case-sensitive user strings.\n\n## Fix\nUpgrade to OpenFGA 1.18.0 or greater.\n\n## Acknowledgements\nOpenFGA would like to thank @sahajamoth for the detailed report.",
  "id": "GHSA-cf98-j28v-49v6",
  "modified": "2026-06-18T15:05:30Z",
  "published": "2026-06-18T15:05:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openfga/openfga"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenFGA Improper Policy Enforcement"
}

CVE-2026-55170 (GCVE-0-2026-55170)

Vulnerability from cvelistv5 – Published: 2026-07-09 21:04 – Updated: 2026-07-09 21:04

Title

OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions

Summary

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0.

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CWE

CWE-178 - Improper Handling of Case Sensitivity

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/openfga/openfga/security/advis…	x_refsource_CONFIRM
https://github.com/openfga/helm-charts/commit/96d…	x_refsource_MISC
https://github.com/openfga/openfga/commit/a2e0dbe…	x_refsource_MISC
https://github.com/openfga/helm-charts/releases/t…	x_refsource_MISC
https://github.com/openfga/openfga/releases/tag/v1.18.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
openfga	openfga	Affected: < 1.18.0

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "openfga",
          "vendor": "openfga",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.18.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-178",
              "description": "CWE-178: Improper Handling of Case Sensitivity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T21:04:28.713Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6"
        },
        {
          "name": "https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8"
        },
        {
          "name": "https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11"
        },
        {
          "name": "https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9"
        },
        {
          "name": "https://github.com/openfga/openfga/releases/tag/v1.18.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/openfga/releases/tag/v1.18.0"
        }
      ],
      "source": {
        "advisory": "GHSA-cf98-j28v-49v6",
        "discovery": "UNKNOWN"
      },
      "title": "OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55170",
    "datePublished": "2026-07-09T21:04:28.713Z",
    "dateReserved": "2026-06-16T15:13:28.166Z",
    "dateUpdated": "2026-07-09T21:04:28.713Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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