# Snowflake: Major incident: INC20000173

**Summary:** Snowflake reported a major Snowsight authentication outage in AWS - US West (Oregon), causing immediate logout after successful authentication. The vendor stated a start of 15:00 UTC August 24, 2026; recorded duration was 1 h 41 min, resolved at 2026-08-24 18:03 UTC. Snowflake attributed the issue to a system configuration and implemented a fix. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-08-24 16:22 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/878nkbf80f7c](https://stspg.io/878nkbf80f7c)
- [Company: Snowflake](https://rewindex.com/company/snowflake.md)
- Versions: before (none: first archived) → after incident\_version:164/mhntf8gmn065@464ead9340b9
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ INC20000173
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2026-08-24 16:22 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-24 18:03 UTC
```

**6. Added: Affected components**

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

**7. Added: Update** (investigating) · 2026-08-24 16:22 UTC

```diff
+ Current status: We're investigating an issue with Snowflake Data Cloud. We'll provide an update within 1 hour. Customer experience: Customers hosted in the specified regions may be unable to access or use Snowflake services and features using Snowsight. Workaround: There are currently no available workarounds for this issue. Incident start time: 15:00 UTC August 24, 2026
```

**8. Added: Update** (identified) · 2026-08-24 16:53 UTC

```diff
+ Current status: We've identified an issue with a system configuration that is causing authentication problems in Snowsight, and we're developing and implementing a fix to restore service. We'll provide an update within 30 minutes. Customer experience: Customers hosted in the specified region may be unable to remain logged in to Snowsight, experiencing immediate logout after successful authentication. ETA: An ETA is not yet available. We'll provide one as soon as possible. Workaround: There are currently no available workarounds for this issue. Incident start time: 15:00 UTC August 24, 2026
```

**9. Added: Update** (identified) · 2026-08-24 17:17 UTC

```diff
+ Current status: We're in the process of implementing a fix for this issue. We'll provide an update within the next 60 minutes. Customer experience: Customers hosted in the specified region may be unable to remain logged in to Snowsight, experiencing immediate logout after successful authentication. An ETA is not yet available. We'll provide one as soon as possible. Workaround: There are no available workarounds for this issue. Incident start time: 15:00 UTC August 24, 2026
```

**10. Added: Update** (monitoring) · 2026-08-24 17:37 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. Customer experience: Customers hosted in the specified region may have been unable to remain logged in to Snowsight, experiencing immediate logout after successful authentication. Workaround: There were no available workarounds for this issue. Incident start time: 14:47 UTC August 24, 2026 Incident end time: 17:21 UTC August 24, 2026 Preliminary root cause: A system configuration change caused an outdated application version to be deployed, resulting in authentication session failures. Once identified, the configuration was corrected to restore the proper application version.
```

**11. Added: Update** (resolved) · 2026-08-24 18:03 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 remain logged in to Snowsight, experiencing immediate logout after successful authentication. Incident start time: 14:47 UTC August 24, 2026 Incident end time: 17:21 UTC August 24, 2026 Preliminary root cause: A system configuration change caused an outdated application version to be deployed, resulting in authentication session failures. Once identified, the configuration was corrected to restore the proper application version. A root cause analysis (RCA) will be conducted and a summary will be shared on the Snowflake status page within 5 business days.
```

**12. Added: Update** (postmortem) · 2026-08-31 22:54 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/INC20000173](https://community.snowflake.com/s/article/INC20000173)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-24 16:22 UTC | Major incident: INC20000173 (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/i84e235db1fcf46 · Markdown: https://rewindex.com/change/i84e235db1fcf46.md · JSON: https://rewindex.com/api/v1/changes/i84e235db1fcf46 · Generated 2026-10-18T01:52:50.953Z