{"id":"CVE-2026-101274","revision":null,"records":[{"revision":"f966883fb38c45c4b2876130a740ca61","observedAt":"2026-10-28T11:27:43.363+00:00","statement":{"source":"cve-program","id":"CVE-2026-101274","aliases":[],"title":"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 …","description":"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.","state":0,"publishedAt":"2026-10-28T10:31:23.485+00:00","modifiedAt":"2026-10-28T10:31:23.485+00:00","affected":[{"ecosystem":"https://pypi.python.org","name":"pretix","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"pretix\",\n                    \"collectionURL\": \"https://pypi.python.org\",\n                    \"packageName\": \"pretix\",\n                    \"repo\": \"https://github.com/pretix/pretix\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"2026.6.4\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2026.7.0\",\n                            \"lessThan\": \"2026.7.3\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2026.8.0\",\n                            \"lessThan\": \"2026.8.1\",\n                            \"versionType\": \"python\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.9,"severity":"MEDIUM"}],"references":["https://pretix.eu/about/en/blog/20261028-release-2026-8-1/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101274","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101274","identifiers":["CVE-2026-101274"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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