# Contentful: CORS errors on CDA

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-09-29 14:39 UTC · Resolved: 2026-09-29 15:44 UTC · Duration: 1.1 h
- Updates: 3 · Affected components: Content Delivery API, Content Delivery API, EU data residency - Content Delivery API
- [Vendor status page: https://stspg.io/r044gjmkw13f](https://stspg.io/r044gjmkw13f)
- [Company: Contentful](https://rewindex.com/company/contentful.md)

## Summary

Contentful reported a major incident affecting some customers: CORS preflight failures for browser requests to cross-space references on CDA, including EU data residency. It started at 2026-09-29 14:39 UTC and was resolved at 2026-09-29 15:44 UTC, lasting 1 h 5 min; Contentful identified the cause but did not disclose it or the fix. _(machine-written, sol)_
## Timeline of updates

- **identified** 2026-09-29 14:39 UTC: Some customers are seeing CORS preflight failures when requesting cross-space references on CDA through webbrowsers. We've identified the cause and are working on resolution.
- **monitoring** 2026-09-29 15:16 UTC: The issue has been resolved. We are monitoring the situation.
- **resolved** 2026-09-29 15:44 UTC: The issue has been resolved.

## Rewindex changes for this incident

- 2026-09-29 14:39 UTC: [Major incident: CORS errors on CDA](https://rewindex.com/change/i60bc84e59de3a3.md)


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Canonical: https://rewindex.com/company/contentful/incidents/1f3x23l45483 · Markdown: https://rewindex.com/company/contentful/incidents/1f3x23l45483.md · JSON: https://rewindex.com/api/v1/companies/contentful/incidents/1f3x23l45483 · Generated 2026-10-18T12:23:20.883Z