Vulnerability-Lookup

GHSA-HCXC-WF8J-23HV

Vulnerability from github – Published: 2026-06-19 14:35 – Updated: 2026-06-19 14:35

Summary

OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset

Details

Description

OpenFGA's OIDC authenticator skipped JWT audience (aud) validation when no audience was configured. In deployments where one identity provider issues tokens for multiple services, a token minted for an unrelated service could authenticate to OpenFGA.

Preconditions

This applies if the following preconditions are met:

You run OpenFGA with authn.method set to oidc.
You configured authn.oidc.issuer but did not set authn.oidc.audience (--authn-oidc-audience / OPENFGA_AUTHN_OIDC_AUDIENCE).

Fix

Upgrade to OpenFGA 1.18.0 or greater. OpenFGA now refuses to start in oidc mode unless both authn.oidc.issuer and authn.oidc.audience are set, and the aud claim is always validated.

Acknowledgements

OpenFGA would like to thank https://github.com/0xVijay for the report.

Severity

6.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Show details on source website

JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.17.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/openfga/openfga"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55689"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T14:35:35Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Description\n\nOpenFGA\u0027s OIDC authenticator skipped JWT audience (`aud`) validation when no audience was configured.\nIn deployments where one identity provider issues tokens for multiple services,\na token minted for an unrelated service could authenticate to OpenFGA.\n\n## Preconditions\n\nThis applies if the following preconditions are met:\n\n1. You run OpenFGA with `authn.method` set to `oidc`.\n2. You configured `authn.oidc.issuer` but did **not** set\n   `authn.oidc.audience` (`--authn-oidc-audience` / `OPENFGA_AUTHN_OIDC_AUDIENCE`).\n\n## Fix\n\nUpgrade to OpenFGA 1.18.0 or greater. OpenFGA now refuses to start in `oidc`\nmode unless both `authn.oidc.issuer` and `authn.oidc.audience` are set, and the\n`aud` claim is always validated.\n\n## Acknowledgements\n\nOpenFGA would like to thank https://github.com/0xVijay for the report.",
  "id": "GHSA-hcxc-wf8j-23hv",
  "modified": "2026-06-19T14:35:35Z",
  "published": "2026-06-19T14:35:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openfga/openfga"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset"
}

CVE-2026-55689 (GCVE-0-2026-55689)

Vulnerability from cvelistv5 – Published: 2026-07-09 21:06 – Updated: 2026-07-10 13:45

Title

OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset

Summary

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, OpenFGA's OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/openfga/openfga/security/advis…	x_refsource_CONFIRM
https://github.com/openfga/openfga/commit/4459677…	x_refsource_MISC
https://github.com/openfga/helm-ch	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

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55689",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-10T13:45:33.367225Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-10T13:45:39.194Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "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, OpenFGA\u0027s OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-09T21:06:22.543Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv"
        },
        {
          "name": "https://github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271"
        },
        {
          "name": "https://github.com/openfga/helm-ch",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openfga/helm-ch"
        },
        {
          "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-hcxc-wf8j-23hv",
        "discovery": "UNKNOWN"
      },
      "title": "OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55689",
    "datePublished": "2026-07-09T21:06:22.543Z",
    "dateReserved": "2026-06-17T00:13:10.650Z",
    "dateUpdated": "2026-07-10T13:45:39.194Z",
    "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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