# 2025-July-22 Service Incident

- Provider: [Sauce Labs](https://down.guide/providers/saucelabs)
- Confidence: Confirmed
- Impact: Partial outage
- lasted 4h 29m
- started 2025-07-22 08:50 UTC
- US-West, US-West, US-West +2
- us, us-west-1
- id: DWN-73735d1e64
- Official page: https://stspg.io/c9bp7l1whr83

## Root cause
> Why it happened: This issue was caused by Cache poisoning via a specific header.

[Postmortem](https://stspg.io/c9bp7l1whr83)

## Updates from Sauce Labs
### 2025-07-22 08:50 UTC: investigating
We are currently seeing intermittent errors accessing the US-West-1 Sauce Labs dashboard. We are investigating.

### 2025-07-22 09:53 UTC: investigating
We are continuing to investigate this issue.

### 2025-07-22 12:07 UTC: monitoring
We have been seeing intermittent errors accessing the US-West-1 Sauce Labs dashboard. We have identified a solution and have deployed a fix for this issue. We are monitoring.

### 2025-07-22 13:19 UTC: resolved
After taking remedial action, the Sauce Labs dashboard is now stable and available. This incident is resolved.

### 2025-08-20 10:02 UTC: postmortem
Dates:
Tuesday July 22d 2025, 07:28 UTC - 15:07 UTC.
What happened:
The Sauce Labs dashboard for our US-West-1 datacenter was unavailable intermittently during the incident timeline.
Why it happened:
This issue was caused by Cache poisoning via a specific header.
How we fixed it:
The header settings were reviewed and fixed in our proxies.
What we are doing to prevent it from happening again:
We have added stricter rules to prevent further cache poisoning attempts.

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