On 25.10.2026 between 18:01 and 18:23 UTC, some stores in the EU region saw elevated error rates on the GraphQL API, mostly HTTP 503 responses, along with slower responses. A sudden traffic spike triggered a bug in Saleor’s OIDC authentication that caused a large number of unnecessary database writes and overloaded a shared database. Error rates were back to normal for all stores by 18:23 UTC.
We’ve identified the bug and are preparing to roll out the long-term fix (saleor/saleor#19960) to all affected Saleor versions. We are sorry for the disruption.
Resolved
On 25.10.2026 between 18:01 and 18:23 UTC, some stores in the EU region saw elevated error rates on the GraphQL API, mostly HTTP 503 responses, along with slower responses. A sudden traffic spike triggered a bug in Saleor’s OIDC authentication that caused a large number of unnecessary database writes and overloaded a shared database. Error rates were back to normal for all stores by 18:23 UTC.
We’ve identified the bug and are preparing to roll out the long-term fix (saleor/saleor#19960) to all affected Saleor versions. We are sorry for the disruption.
Monitoring
Error rates are back to normal for all affected stores. We’re monitoring the situation and continuing to investigate.
Identified
We’ve identified the cause and are working on mitigating the impact.
Investigating
We’re observed elevated error rates on the GraphQL API for some stores in the EU region and are investigating.