# Claude: Major incident: Elevated errors on Claude Code and Claude Cowork

**Summary:** Claude reported a major incident affecting Claude Cowork and Claude Code on the web from 2026-08-28 17:22 UTC to 2026-08-28 20:21 UTC, lasting 2 h 59 min. Some sessions failed to start or disconnected mid-task due to an upstream cloud provider issue; affected sessions could be retried. A mitigation was applied before resolution. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-08-28 17:22 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/6rfby2z7stc2](https://stspg.io/6rfby2z7stc2)
- [Company: Claude](https://rewindex.com/company/claude.md)
- Versions: before (none: first archived) → after incident\_version:6/vr9tpk8w7zr8@84a9154ddf90
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Elevated errors on Claude Code and Claude Cowork
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-08-28 17:22 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-28 20:21 UTC
```

**6. Added: Affected components**

```diff
+ Claude Code, Claude Cowork
```

**7. Added: Update** (identified) · 2026-08-28 17:22 UTC

```diff
+ We have identified an issue with an upstream cloud provider affecting Claude Cowork and Claude Code on the web. Some sessions may fail to start or disconnect mid-task; affected sessions can be retried. We are in contact with the provider and will provide an update as soon as possible.
```

**8. Added: Update** (monitoring) · 2026-08-28 18:21 UTC

```diff
+ A mitigation has been applied for the issue affecting Claude Cowork and Claude Code on the web, and we are monitoring for recovery. Sessions that disconnected earlier can be retried
```

**9. Added: Update** (resolved) · 2026-08-28 20:21 UTC

```diff
+ The issue affecting Claude Cowork and Claude Code on the web has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-28 17:22 UTC | Major incident: Elevated errors on Claude Code and Claude Cowork (this change) | outage |

All Claude changes: [timeline](https://rewindex.com/company/claude/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/i28b75630300883 · Markdown: https://rewindex.com/change/i28b75630300883.md · JSON: https://rewindex.com/api/v1/changes/i28b75630300883 · Generated 2026-10-18T02:55:38.075Z