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
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-101274?
CVE-2026-101274 is a medium-severity vulnerability, published on 28 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-101274?
How do I fix CVE-2026-101274?
No fix has been published for CVE-2026-101274 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101274 being exploited?
There is no known exploitation of CVE-2026-101274 in the wild and no public exploit code.
Sources
Also known as GHSA-jgpc-mvf3-4rpj.