# Astronomer: Major incident: Increased auth errors

**Summary:** Astronomer reported a major outage affecting authentication, deployment access and DAG visibility, with 401 and RBAC errors for multiple customers. It started at 2026-09-04 03:08 UTC and was resolved at 2026-09-04 06:07 UTC, lasting 2 h 58 min. A network configuration change during an infrastructure upgrade disrupted control-plane connectivity to customer deployments; Astronomer applied a fix and confirmed normal operation. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-04 03:08 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://status.astronomer.io/incidents/01M1N67NVTBCAEETQPS70AQ8JR](https://status.astronomer.io/incidents/01M1N67NVTBCAEETQPS70AQ8JR)
- [Company: Astronomer](https://rewindex.com/company/astronomer.md)
- Versions: before (none: first archived) → after incident\_version:135/01M1N67NVTBCAEETQPS70AQ8JR@8c7704a3615f
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Increased auth errors
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-04 03:08 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-04 06:07 UTC
```

**6. Added: Update** (investigating) · 2026-09-04 03:08 UTC

```diff
+ We are currently investigating an issue affecting deployment access, authentication, and related services for multiple customers. Some users may experience 401 errors when using organization-based Astronomer URLs (ORG_ID.astronomer.run), as well as "RBAC: access denied" errors or difficulty viewing DAGs in the Astronomer UI.
```

**7. Added: Update** (investigating) · 2026-09-04 04:28 UTC

```diff
+ We're continuing to investigate the issue affecting access/auth to some deployments and services. We will follow up with an update no later than 5:30 AM UTC on Friday, September 4, 2026, or sooner if we have something to share.
```

**8. Added: Update** (identified) · 2026-09-04 04:52 UTC

```diff
+ The potential root cause identified, and fix is underway
```

**9. Added: Update** (monitoring) · 2026-09-04 05:53 UTC

```diff
+ We identified and resolved an infrastructure configuration issue that was causing authentication failures and deployment access errors across the platform. The root cause was a network configuration change during an  infrastructure upgrade that temporarily disrupted connectivity between our control plane and customer deployments. The fix has been applied and initial validation confirms services are recovering We are actively monitoring to confirm full recovery across all affected deployments. If you are still experiencing issues, please contact support.
```

**10. Added: Update** (resolved) · 2026-09-04 06:07 UTC

```diff
+ The issue has been fully resolved. All services, including authentication, deployment access, and DAG visibility, are operating normally. We apologize for the disruption and thank you for your patience.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-04 03:08 UTC | Major incident: Increased auth errors (this change) | outage |

All Astronomer changes: [timeline](https://rewindex.com/company/astronomer/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


---
Canonical: https://rewindex.com/change/i112a8e6705723d · Markdown: https://rewindex.com/change/i112a8e6705723d.md · JSON: https://rewindex.com/api/v1/changes/i112a8e6705723d · Generated 2026-10-18T02:31:41.365Z