# WorkOS: Major incident: SSO API Latency Degradation Caused by Transient Capacity Constraints

**Summary:** WorkOS reported major SSO degradation, with increased latency and intermittent timeouts between 14:40 and 14:53 UTC, caused by temporarily reduced capacity following an infrastructure event. The incident record started at 2026-04-20 19:16 UTC and resolved at 2026-04-20 19:17 UTC (1 min); SSO login performance returned to normal. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-04-20 19:16 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/kmcr89gl83b8](https://stspg.io/kmcr89gl83b8)
- [Company: WorkOS](https://rewindex.com/company/workos.md)
- Versions: before (none: first archived) → after incident\_version:324/093zzfy1l9t9@66702acad06a
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ SSO API Latency Degradation Caused by Transient Capacity Constraints
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-04-20 19:16 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-04-20 19:17 UTC
```

**6. Added: Affected components**

```diff
+ AuthKit, Core Services - AuthKit, Core Services - SSO, SSO
```

**7. Added: Update** (identified) · 2026-04-20 19:16 UTC

```diff
+ Between 14:40 and 14:53 UTC, SSO endpoints experienced increased latency and intermittent timeouts. The issue was caused by a temporary reduction in available capacity due to an underlying infrastructure event, which led to a brief period of degraded performance
```

**8. Added: Update** (resolved) · 2026-04-20 19:17 UTC

```diff
+ The issue has been resolved, and SSO login performance has returned to normal. We will continue to monitor closely to ensure stability.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-04-20 19:16 UTC | Major incident: SSO API Latency Degradation Caused by Transient Capacity Constraints (this change) | degradation |

All WorkOS changes: [timeline](https://rewindex.com/company/workos/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/i72652c1aab005d · Markdown: https://rewindex.com/change/i72652c1aab005d.md · JSON: https://rewindex.com/api/v1/changes/i72652c1aab005d · Generated 2026-10-18T03:55:49.358Z