# Sourcegraph: Major incident: Sign-in and authentication errors

**Summary:** Sourcegraph reported a major incident affecting account sign-in and authentication, starting 2026-09-01 15:41 UTC and resolved 2026-09-02 09:39 UTC, lasting 17 h 58 min. Sourcegraph attributed the errors to a Google Cloud networking incident; sign-in had recovered by 2026-09-01 16:48 UTC, with monitoring continuing afterward. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-01 15:41 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://sourcegraphstatus.com/incidents/01M1ESPYPN9TPBX3AFT17XS6XJ](https://sourcegraphstatus.com/incidents/01M1ESPYPN9TPBX3AFT17XS6XJ)
- [Company: Sourcegraph](https://rewindex.com/company/sourcegraph.md)
- Versions: before (none: first archived) → after incident\_version:41/01M1ESPYPN9TPBX3AFT17XS6XJ@8da078cf7e0d
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Sign-in and authentication errors
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-01 15:41 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-02 09:39 UTC
```

**6. Added: Update** (identified) · 2026-09-01 15:34 UTC

```diff
+ We're aware of errors affecting sign-in and authentication for Sourcegraph accounts. This is caused by a Google Cloud networking incident, and we're monitoring for recovery.
```

**7. Added: Update** (identified) · 2026-09-01 15:41 UTC

```diff
+ The issue has been identified and we're working on a fix
```

**8. Added: Update** (monitoring) · 2026-09-01 16:48 UTC

```diff
+ Error rates have returned to normal and sign-in has recovered. The underlying Google Cloud networking incident is still ongoing, so we're continuing to monitor closely.
```

**9. Added: Update** (resolved) · 2026-09-02 09:39 UTC

```diff
+ The issue has been resolved
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-01 15:41 UTC | Major incident: Sign-in and authentication errors (this change) | outage |

All Sourcegraph changes: [timeline](https://rewindex.com/company/sourcegraph/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/i612a790fe39a03 · Markdown: https://rewindex.com/change/i612a790fe39a03.md · JSON: https://rewindex.com/api/v1/changes/i612a790fe39a03 · Generated 2026-10-18T03:33:51.973Z