CVE-2026-101274
When pretix is used as the identity provider in a Single-Sign-On (SSO) setup for customer accounts…
- Risk score
- 41/100
- CVSS
- 6.9 v4.0
- Published
- 28 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 re…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.9 medium
References
Original 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.
Last activity 28 Oct 2026. Patch Forecast updates every hour.