GHSA-XQ8M-7C5P-C2R6

Vulnerability from github – Published: 2026-04-21 15:21 – Updated: 2026-04-21 15:21
VLAI?
Summary
Auth0 Next.js SDK has Improper Proxy Cache Lookup
Details

Description

In affected versions of the Next.js SDK, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results.

Which Projects are Affected?

Users are affected if they meet all of the following preconditions: - Applications using the auth0/nextjs-auth0 SDK, versions 4.12.0 to 4.17.0, and - Applications using the proxy handler /me/ and /my-org/ with DPoP enabled.

Affected product and versions

Auth0/nextjs-auth0 v4.12.0 to 4.17.0

Resolution

Upgrade Auth0/nextjs-auth0 version to v4.18.0 or greater

Acknowledgements

Okta would like to thank Reynaldo Immanuel for their discovery and responsible disclosure.

Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.17.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@auth0/nextjs-auth0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.12.0"
            },
            {
              "fixed": "4.18.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-40155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-21T15:21:46Z",
    "nvd_published_at": "2026-04-17T21:16:33Z",
    "severity": "MODERATE"
  },
  "details": "### Description\nIn affected versions of the Next.js SDK, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results.\n\n### Which Projects are Affected?\nUsers are affected if they meet all of the following preconditions:\n- Applications using the auth0/nextjs-auth0 SDK, versions 4.12.0 to 4.17.0, and\n- Applications using the proxy handler  /me/* and /my-org/* with DPoP enabled.\n\n\n### Affected product and versions\nAuth0/nextjs-auth0 v4.12.0 to 4.17.0\n\n### Resolution\nUpgrade Auth0/nextjs-auth0 version to v4.18.0 or greater\n\n### Acknowledgements\nOkta would like to thank Reynaldo Immanuel for their discovery and responsible disclosure.",
  "id": "GHSA-xq8m-7c5p-c2r6",
  "modified": "2026-04-21T15:21:46Z",
  "published": "2026-04-21T15:21:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40155"
    },
    {
      "type": "WEB",
      "url": "https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/auth0/nextjs-auth0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Auth0 Next.js SDK has Improper Proxy Cache Lookup"
}


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  • 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.