{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-49284",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-28T20:07:58.861Z",
        "datePublished": "2026-07-17T19:17:23.897Z",
        "dateUpdated": "2026-07-20T19:22:12.247Z"
    },
    "containers": {
        "cna": {
            "title": "SimpleSAMLphp SP accepts a response from an unexpected IdP when unsigned `Response/InResponseTo` is combined with a signed assertion lacking `SubjectConfirmationData/InResponseTo`",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-345",
                            "lang": "en",
                            "description": "CWE-345: Insufficient Verification of Data Authenticity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm"
                },
                {
                    "name": "https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.4.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.4.7"
                },
                {
                    "name": "https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.5.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.5.2"
                }
            ],
            "affected": [
                {
                    "vendor": "simplesamlphp",
                    "product": "simplesamlphp",
                    "versions": [
                        {
                            "version": "< 2.4.7",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.5.0-rc1, < 2.5.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-17T19:17:23.897Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "SimpleSAMLphp versions before 1.18.6 contain an information disclosure vulnerability. Prior to 2.4.7 and 2.5.2, SimpleSAMLphp's SAML SP ACS path does not enforce the IdP selected for an SP-initiated login when unsigned Response/InResponseTo is combined with a signed assertion lacking SubjectConfirmationData/InResponseTo, allowing a response issued by one trusted IdP to be bound to SP state created for another IdP and bypass flows that route users to a specific IdP, including deployments that set enable_unsolicited to false. This issue is fixed in versions 2.4.7 and 2.5.2."
                }
            ],
            "source": {
                "advisory": "GHSA-q8r6-xj3f-wrrm",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-20T19:21:50.152369Z",
                                "id": "CVE-2026-49284",
                                "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": "2026-07-20T19:22:12.247Z"
                }
            }
        ]
    }
}