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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-101274

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 authori

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Status
Published
Published
Updated
Assigning organization
pretix

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

pretix pretix

Default version status: unaffected

  • 0 to < 2026.6.4affected
  • 2026.7.0 to < 2026.7.3affected
  • 2026.8.0 to < 2026.8.1affected

References