# Semgrep: Major incident: Logins are failing for users via GitHub auth

**Summary:** Semgrep reported a major outage affecting GitHub-auth logins starting 2026-05-20 17:34 UTC; SSO logins were unaffected. A fix was rolled out at 17:49 UTC, restoring logins, and the incident was resolved at 2026-05-20 18:18 UTC after 44 min. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-05-20 17:34 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/pt3vqkp32fpp](https://stspg.io/pt3vqkp32fpp)
- [Company: Semgrep](https://rewindex.com/company/semgrep.md)
- Versions: before (none: first archived) → after incident\_version:316/b3ns2rs4wkdt@0c757b7dd518
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Logins are failing for users via GitHub auth
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-05-20 17:34 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-05-20 18:18 UTC
```

**6. Added: Affected components**

```diff
+ Login/SSO, semgrep.dev - Login/SSO
```

**7. Added: Update** (identified) · 2026-05-20 17:34 UTC

```diff
+ We are currently observing login issues using GitHub auth. Our team has identified the issue and is currently working on a fix. SSO logins are working as expected and are not impacted.
```

**8. Added: Update** (monitoring) · 2026-05-20 17:49 UTC

```diff
+ We have rolled out a fix, and logins are now working as expected. We are closely monitoring to ensure continued stability.
```

**9. Added: Update** (monitoring) · 2026-05-20 18:17 UTC

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

**10. Added: Update** (resolved) · 2026-05-20 18:18 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-05-20 17:34 UTC | Major incident: Logins are failing for users via GitHub auth (this change) | outage |

All Semgrep changes: [timeline](https://rewindex.com/company/semgrep/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/i3de15037cd3916 · Markdown: https://rewindex.com/change/i3de15037cd3916.md · JSON: https://rewindex.com/api/v1/changes/i3de15037cd3916 · Generated 2026-10-18T02:28:26.990Z