GHSA-8QJV-JJ2Q-X832

Vulnerability from github – Published: 2026-05-06 17:05 – Updated: 2026-05-06 17:05
VLAI
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
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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": null,
    "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": "2026-05-06T17:05:14Z",
  "published": "2026-05-06T17:05:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832"
    },
    {
      "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"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.