Vulnerability-Lookup

GHSA-8QJV-JJ2Q-X832

Vulnerability from github – Published: 2026-05-06 17:05 – Updated: 2026-06-08 23:41

Summary

Auth.js SDK has Improper Permission Checking

Details

Description

Under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided.

Am I Affected?

Users are affected if they meet each of the following preconditions: - Applications built using Auth0.js version between 8.11.0 and 9.32.0 - The application’s access control relies on rules defined in Auth0 Actions.

Affected product and versions

auth0.js SDK v8.11.0 to v9.32.0

Resolution

Upgrade auth0/auth0.js to v10.0.0 or greater.

Acknowledgements

Okta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.

Severity

7.1 (High)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 9.32.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "auth0-js"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.11.0"
            },
            {
              "fixed": "10.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42280"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-06T17:05:14Z",
    "nvd_published_at": "2026-05-27T15:16:27Z",
    "severity": "HIGH"
  },
  "details": "### Description\nUnder specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided.\n\n### Am I Affected?\nUsers are affected if they meet each of the following preconditions:\n- Applications built using Auth0.js version between 8.11.0 and 9.32.0\n- The application\u2019s access control relies on rules defined in Auth0 Actions.\n\n\n### Affected product and versions\nauth0.js SDK v8.11.0 to v9.32.0\n\n### Resolution\nUpgrade auth0/auth0.js to v10.0.0 or greater.\n\n### Acknowledgements\nOkta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.",
  "id": "GHSA-8qjv-jj2q-x832",
  "modified": "2026-06-08T23:41:42Z",
  "published": "2026-05-06T17:05:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42280"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/auth0/auth0.js"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Auth.js SDK has Improper Permission Checking"
}

CVE-2026-42280 (GCVE-0-2026-42280)

Vulnerability from cvelistv5 – Published: 2026-05-27 14:39 – Updated: 2026-05-28 15:36

Title

Improper Permission Checking in Auth.js SDK

Summary

Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-28 15:36 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/auth0/auth0.js/security/adviso…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
auth0	auth0.js	Affected: >= 8.11.0 , <= 9.32.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42280",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T15:36:47.306227Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T15:36:56.102Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "auth0.js",
          "vendor": "auth0",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 8.11.0 , \u003c= 9.32.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T14:39:15.789Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832"
        }
      ],
      "source": {
        "advisory": "GHSA-8qjv-jj2q-x832",
        "discovery": "UNKNOWN"
      },
      "title": "Improper Permission Checking in Auth.js SDK"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-42280",
    "datePublished": "2026-05-27T14:39:15.789Z",
    "dateReserved": "2026-04-26T11:53:27.717Z",
    "dateUpdated": "2026-05-28T15:36:56.102Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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