# Snowflake: Critical incident: INC20000063

**Summary:** Snowflake reported a critical Snowsight authentication outage in AWS - US West (Oregon), preventing access or unexpectedly logging customers out; other Snowflake features were unaffected. It started at 2026-06-30 22:34 UTC and was resolved at 2026-06-30 23:34 UTC, lasting 1 h 0 min. Snowflake implemented a fix and published an RCA link. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-06-30 22:34 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/2ntzkjjp4pr1](https://stspg.io/2ntzkjjp4pr1)
- [Company: Snowflake](https://rewindex.com/company/snowflake.md)
- Versions: before (none: first archived) → after incident\_version:164/rqkrpr2hf7f7@fb217edd4260
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ INC20000063
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2026-06-30 22:34 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-06-30 23:34 UTC
```

**6. Added: Affected components**

```diff
+ Applications, AWS - US West (Oregon) - Applications
```

**7. Added: Update** (identified) · 2026-06-30 22:34 UTC

```diff
+ Current status: We're investigating an issue with Snowsight authentication. We are seeing recovery as of 22:03 UTC and are continuing to monitor. We'll provide an update within 60 minutes. Customer experience: Customers may be unable to access Snowsight or may experience being logged out unexpectedly. All other Snowflake features are not impacted. ETA: We have taken action to address the issue and expect it to be resolved as of 22:03 UTC. Incident start time: 21:47 UTC June 30, 2026
```

**8. Added: Update** (monitoring) · 2026-06-30 22:39 UTC

```diff
+ Current status: We've implemented the fix for this issue, and we'll continue to monitor the environment until we're confident all services are functioning properly. We'll provide another update within 60 minutes. Customer experience: Customers hosted in the specified region may have been unable to access Snowsight or may have experienced being logged out unexpectedly. All other Snowflake features were not impacted. Workaround: While we were focused on remediation, customers who were logged out needed to log back in to Snowsight. Incident start time: 21:47 UTC June 30, 2026 Incident end time: 22:03 UTC June 30, 2026 Preliminary root cause: A routine system configuration change caused authentication issues with Snowsight. Once identified, the configuration was reverted.
```

**9. Added: Update** (resolved) · 2026-06-30 23:34 UTC

```diff
+ Current status: We've implemented the fix for this issue and monitored the environment to confirm that service was restored. If you experience additional issues or have questions, please open a support case via Snowflake Community or the Support page in Snowsight. Customer experience: Customers hosted in the specified region may have been unable to access Snowsight or may have experienced being logged out unexpectedly. All other Snowflake features were not impacted. Workaround: While we were focused on remediation, customers who were logged out needed to log back in to Snowsight. Incident start time: 21:47 UTC June 30, 2026 Incident end time: 22:03 UTC June 30, 2026 Preliminary root cause: A routine system configuration change caused authentication issues with Snowsight. Once identified, the configuration was reverted. A root cause analysis (RCA) will be conducted and a summary will be shared on the Snowflake status page within 5 business days.
```

**10. Added: Update** (postmortem) · 2026-07-08 23:14 UTC

```diff
+ Snowflake Engineering has completed the postmortem of this service incident. A detailed Root Cause Analysis \(RCA\) is available on the Snowflake Community site: [https://community.snowflake.com/s/article/INC20000063](https://community.snowflake.com/s/article/INC20000063)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-06-30 22:34 UTC | Critical incident: INC20000063 (this change) | outage |

All Snowflake changes: [timeline](https://rewindex.com/company/snowflake/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._


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Canonical: https://rewindex.com/change/i0cd55a01c2716a · Markdown: https://rewindex.com/change/i0cd55a01c2716a.md · JSON: https://rewindex.com/api/v1/changes/i0cd55a01c2716a · Generated 2026-10-18T01:54:00.968Z