# Segment: Major incident: Intermittent Segment application login errors

**Summary:** Segment reported a major incident causing intermittent login errors for a subset of customers, affecting Web Interface (EU) and Web Interface (US). It started at 2026-08-18 17:49 UTC and was resolved at 2026-08-18 22:02 UTC, lasting 4 h 13 min; login was reported operating normally at 18:38 UTC. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-08-18 17:49 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/y9dv1gn6xb2x](https://stspg.io/y9dv1gn6xb2x)
- [Company: Segment](https://rewindex.com/company/segment.md)
- Versions: before (none: first archived) → after incident\_version:162/7rk141hn3svb@ac75811b0814
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Intermittent Segment application login errors
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-08-18 17:49 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-18 22:02 UTC
```

**6. Added: Affected components**

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

**7. Added: Update** (identified) · 2026-08-18 17:49 UTC

```diff
+ We have identified an issue that is affecting a subset of Segment customers causing intermittent errors when logging in.
```

**8. Added: Update** (monitoring) · 2026-08-18 18:38 UTC

```diff
+ Segment application login is now operating normally. We will continue to monitor for system stability.
```

**9. Added: Update** (resolved) · 2026-08-18 22:02 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-18 17:49 UTC | Major incident: Intermittent Segment application login errors (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._


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Canonical: https://rewindex.com/change/ia29545daa03827 · Markdown: https://rewindex.com/change/ia29545daa03827.md · JSON: https://rewindex.com/api/v1/changes/ia29545daa03827 · Generated 2026-10-18T02:29:32.571Z