CVE-2026-101274
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 28, 2026
- Updated
- Oct 28, 2026
- Reserved
- Sep 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | pretix |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
pretixpretix |
|
References
- https://pretix.eu/about/en/blog/20261028-release-2026-8-1/vendor-advisory
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