# Semgrep: Major incident: Degraded scan performance in CI and Semgrep Managed Scans

**Summary:** Semgrep reported major scan performance degradation in CI and Semgrep Managed Scans from 2026-01-09 17:02 UTC to 2026-01-09 23:27 UTC, lasting 6 h 25 min. Semgrep implemented several changes and reported recovery; at resolution, the system was stable and scans were executing normally. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-01-09 17:02 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/5v2wx11lwlwv](https://stspg.io/5v2wx11lwlwv)
- [Company: Semgrep](https://rewindex.com/company/semgrep.md)
- Versions: before (none: first archived) → after incident\_version:316/rmylqm1z4hwr@93dc5c11ab0e
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Degraded scan performance in CI and Semgrep Managed Scans
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-01-09 17:02 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-01-09 23:27 UTC
```

**6. Added: Affected components**

```diff
+ Managed Scans, Scans and CI/CD, semgrep.dev - Managed Scans, semgrep.dev - Scans and CI/CD
```

**7. Added: Update** (investigating) · 2026-01-09 17:02 UTC

```diff
+ We are currently investigating an issue with degraded scan performance in CI and Semgrep Managed Scans.
```

**8. Added: Update** (investigating) · 2026-01-09 18:44 UTC

```diff
+ We are continuing to investigate the cause of the issue.
```

**9. Added: Update** (monitoring) · 2026-01-09 22:53 UTC

```diff
+ We've identified and implemented several changes, and we are seeing recovery. We will continue to actively monitor.
```

**10. Added: Update** (resolved) · 2026-01-09 23:27 UTC

```diff
+ This issue has been resolved. The system is now stable and scans are executing normally.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-01-09 17:02 UTC | Major incident: Degraded scan performance in CI and Semgrep Managed Scans (this change) | degradation |

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/i6f617eb09e26dd · Markdown: https://rewindex.com/change/i6f617eb09e26dd.md · JSON: https://rewindex.com/api/v1/changes/i6f617eb09e26dd · Generated 2026-10-18T01:29:49.129Z