{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-101274",
        "assignerOrgId": "655498c3-6ec5-4f0b-aea6-853b334d05a6",
        "state": "PUBLISHED",
        "assignerShortName": "pretix",
        "dateReserved": "2026-09-28T11:48:56.321Z",
        "datePublished": "2026-10-28T10:31:23.485Z",
        "dateUpdated": "2026-10-28T10:31:23.485Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "655498c3-6ec5-4f0b-aea6-853b334d05a6",
                "shortName": "pretix",
                "dateUpdated": "2026-10-28T10:31:23.485Z"
            },
            "affected": [
                {
                    "vendor": "pretix",
                    "collectionURL": "https://pypi.python.org",
                    "packageName": "pretix",
                    "repo": "https://github.com/pretix/pretix",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "2026.6.4",
                            "versionType": "python"
                        },
                        {
                            "status": "affected",
                            "version": "2026.7.0",
                            "lessThan": "2026.7.3",
                            "versionType": "python"
                        },
                        {
                            "status": "affected",
                            "version": "2026.8.0",
                            "lessThan": "2026.8.1",
                            "versionType": "python"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "When pretix is used as the identity provider in a Single-Sign-On (SSO) setup for customer accounts, the system did not properly validate the `response_type` requested in an authorization request against the configured grant type of the SSO client. This means that if an SSO client was configured to only allow the `code` response type, which requires knowledge of the client secret to use and would wrongfully send a response type like `id_token`, it would receive back a valid token. Exploiting this requires the attacker to run JavaScript on the page specified by `redirect_uri`, which must be from a list specified in the client configuration.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "When pretix is used as the identity provider in a Single-Sign-On (SSO) setup for customer accounts, the system did not properly validate the `response_type` requested in an authorization request against the configured grant type of the SSO client. This means that if an SSO client was configured to only allow the `code` response type, which requires knowledge of the client secret to use and would wrongfully send a response type like `id_token`, it would receive back a valid token. Exploiting this requires the attacker to run JavaScript on the page specified by `redirect_uri`, which must be from a list specified in the client configuration."
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://pretix.eu/about/en/blog/20261028-release-2026-8-1/",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.9,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Ravi Gohel",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.5"
            }
        }
    }
}