# Segment: Major incident: SSO Login Issues with the Segment App

**Summary:** Some customers could not log in to the Segment app via SSO, affecting Web Interface (US). Segment marked the incident major; it ran from 2026-09-10 14:28 UTC to 2026-09-10 15:39 UTC, lasting 1 h 11 min. Segment reported mitigation and fully restored SSO login but did not disclose the root cause. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-10 14:28 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/h5jylclwx3bx](https://stspg.io/h5jylclwx3bx)
- [Company: Segment](https://rewindex.com/company/segment.md)
- Versions: before (none: first archived) → after incident\_version:162/bqwq102tmhc6@a54466f0523c
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ SSO Login Issues with the Segment App
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-10 14:28 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-10 15:39 UTC
```

**6. Added: Affected components**

```diff
+ Web Interface (US), Web Interface - Web Interface (US)
```

**7. Added: Update** (investigating) · 2026-09-10 14:28 UTC

```diff
+ We are actively investigating an issue in which some customers are unable to login to the Segment app via SSO.
```

**8. Added: Update** (identified) · 2026-09-10 15:27 UTC

```diff
+ The root cause of the issue with SSO login has been identified and we are working on a fix.
```

**9. Added: Update** (resolved) · 2026-09-10 15:39 UTC

```diff
+ The issue has been mitigated, and SSO login is now fully functional for the Segment app.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-10 14:28 UTC | Major incident: SSO Login Issues with the Segment App (this change) | outage |

All Segment changes: [timeline](https://rewindex.com/company/segment/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/ia9a04f2e824959 · Markdown: https://rewindex.com/change/ia9a04f2e824959.md · JSON: https://rewindex.com/api/v1/changes/ia9a04f2e824959 · Generated 2026-10-18T02:29:46.662Z