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High

Missing proper state, nonce and PKCE checks for OAuth authentication in next-auth

Type: advisorySources: OSV

NextAuth.js is an open source authentication solution for Next.js applications. `next-auth` applications using OAuth provider versions before `v4.20.1` have been found to be subject to an authentication vulnerability. A bad actor who can read traffic on the victim's network or who is able to social engineer the victim to click a manipulated login link could intercept and tamper with the authorization URL to **log in as the victim**, bypassing the CSRF protection. This is due to a partial failure during a compromised OAuth session where a session code is erroneously generated. This issue has been addressed in version 4.20.1. Users are advised to upgrade. Users unable to upgrade may using Advanced Initialization, manually check the callback request for state, pkce, and nonce against the provider configuration to prevent this issue. See the linked GHSA for details.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-27490
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 16:31 UTC · Revision 1

Source evidence

Missing proper state, nonce and PKCE checks for OAuth authentication in next-auth

core-osv · Original source

Published 9 Mar 2023, 20:37 UTC

NextAuth.js is an open source authentication solution for Next.js applications. `next-auth` applications using OAuth provider versions before `v4.20.1` have been found to be subject to an authentication vulnerability. A bad actor who can read traffic on the victim's network or who is able to social engineer the victim to click a manipulated login link could intercept and tamper with the authorization URL to **log in as the victim**, bypassing the CSRF protection. This is due to a partial failure during a compromised OAuth session where a session code is erroneously generated. This issue has been addressed in version 4.20.1. Users are advised to upgrade. Users unable to upgrade may using Advanced Initialization, manually check the callback request for state, pkce, and nonce against the provider configuration to prevent this issue. See the linked GHSA for details.

osv:CVE-2023-27490
Complete source record
{
  "id": "8eb67733973e2a07b4af5503befe248f99fc4f2bd8a1242491c0b05842895e00",
  "url": "https://osv.dev/vulnerability/CVE-2023-27490",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Missing proper state, nonce and PKCE checks for OAuth authentication in next-auth",
    "summary": "NextAuth.js is an open source authentication solution for Next.js applications. `next-auth` applications using OAuth provider versions before `v4.20.1` have been found to be subject to an authentication vulnerability. A bad actor who can read traffic on the victim's network or who is able to social engineer the victim to click a manipulated login link could intercept and tamper with the authorization URL to **log in as the victim**, bypassing the CSRF protection. This is due to a partial failure during a compromised OAuth session where a session code is erroneously generated. This issue has been addressed in version 4.20.1. Users are advised to upgrade. Users unable to upgrade may using Advanced Initialization, manually check the callback request for state, pkce, and nonce against the provider configuration to prevent this issue. See the linked GHSA for details.",
    "evidence": "osv:CVE-2023-27490",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-27490",
      "aliases": [
        "CVE-2023-27490",
        "GHSA-7r7x-4c4q-c4qf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextauthjs/next-auth",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "50b117dfbbd8392e3c19a5e882a83a7a455d2598"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.20.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextauth.js:next-auth:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.20.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
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            "@next-auth/prisma-adapter@v1.0.2",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-27490.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.642195580Z",
      "provider": "osv",
      "references": [
        "https://authjs.dev/reference/core/providers#checks",
        "https://danielfett.de/2020/05/16/pkce-vs-nonce-equivalent-or-not/",
        "https://next-auth.js.org/configuration/initialization#advanced-initialization",
        "https://next-auth.js.org/configuration/providers/oauth",
        "https://www.rfc-editor.org/rfc/rfc6749#section-10.12",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27490.json",
        "https://github.com/nextauthjs/next-auth/security/advisories/GHSA-7r7x-4c4q-c4qf",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-27490",
        "https://security.netapp.com/advisory/ntap-20230420-0006/"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-352",
          "CWE-384"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27490.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-27490",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504696,
  "published_at": "2023-03-09T20:37:11.407+00:00"
}