{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40155",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-09T19:31:56.013Z",
        "datePublished": "2026-04-17T20:54:38.958Z",
        "dateUpdated": "2026-04-20T14:57:32.023Z"
    },
    "containers": {
        "cna": {
            "title": "Auth0 Next.js SDK has Improper Proxy Cache Lookup",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-362",
                            "lang": "en",
                            "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6"
                },
                {
                    "name": "https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978"
                },
                {
                    "name": "https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0"
                }
            ],
            "affected": [
                {
                    "vendor": "auth0",
                    "product": "nextjs-auth0",
                    "versions": [
                        {
                            "version": ">= 4.12.0, < 4.18.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-17T20:54:38.958Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4.12.0 through 4.17.1, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Users are affected if their project uses both the vulnerable versions and the proxy handler /me/* and /my-org/* with DPoP enabled. This issue has been fixed in version 4.18.0."
                }
            ],
            "source": {
                "advisory": "GHSA-xq8m-7c5p-c2r6",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-20T14:51:32.552302Z",
                                "id": "CVE-2026-40155",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-04-20T14:57:32.023Z"
                }
            }
        ]
    }
}