{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-114620",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-21T20:34:25.600Z",
        "datePublished": "2026-10-22T21:34:11.909Z",
        "dateUpdated": "2026-10-22T21:34:11.909Z"
    },
    "containers": {
        "cna": {
            "title": "Authlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRF",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/authlib/authlib/security/advisories/GHSA-x4rv-c3wx-4cr8",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/authlib/authlib/security/advisories/GHSA-x4rv-c3wx-4cr8"
                },
                {
                    "name": "https://github.com/authlib/authlib/pull/949",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/authlib/pull/949"
                },
                {
                    "name": "https://github.com/authlib/authlib/commit/6563f6f7a8c2f71d2f85ee7511d72a4fbae3acc0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/authlib/commit/6563f6f7a8c2f71d2f85ee7511d72a4fbae3acc0"
                },
                {
                    "name": "https://github.com/authlib/authlib/commit/891e3f10ae5989176211f8be35dcc7cd40aa92c6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/authlib/commit/891e3f10ae5989176211f8be35dcc7cd40aa92c6"
                },
                {
                    "name": "https://github.com/authlib/authlib/releases/tag/v1.9.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/authlib/releases/tag/v1.9.0"
                }
            ],
            "affected": [
                {
                    "vendor": "authlib",
                    "product": "authlib",
                    "versions": [
                        {
                            "version": "< 1.9.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-22T21:34:11.909Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, Authlib's RFC 9101 JWTAuthenticationRequest passes the unauthenticated, client-controlled request_uri parameter to the abstract get_request_object() hook before applying a destination or registration policy; the hook itself performs no network request, while the documentation demonstrates an unrestricted HTTP fetch. In deployments whose integrator implements that hook as an unrestricted outbound fetch, a remote attacker who knows a valid public client identifier can make the authorization server request internal, link-local, or otherwise unintended URLs and can distinguish fetch outcomes through different error responses and timing. Deployments whose custom hook already applies a secure allowlist, destination controls, and retrieval limits are not affected. The JWTAuthenticationRequest implementation in authlib/oauth2/rfc9101/authorization_server.py forwards request_uri to get_request_object() before an application-approved retrieval policy accepts the destination. This issue is fixed in version 1.9.0."
                }
            ],
            "source": {
                "advisory": "GHSA-x4rv-c3wx-4cr8",
                "discovery": "UNKNOWN"
            }
        }
    }
}