# Optimizely: Critical incident: Flags permission issue.

**Summary:** Optimizely reported a critical flags permission issue affecting Application UI and Optimizely REST API, including Feature Experimentation. It started at 2026-05-20 09:42 UTC and was resolved at 2026-05-20 11:30 UTC, lasting 1 h 48 min; a fix was implemented at 10:10 UTC, but no cause or specific customer impact was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-05-20 09:42 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/gwqp5cnrq7h0](https://stspg.io/gwqp5cnrq7h0)
- [Company: Optimizely](https://rewindex.com/company/optimizely.md)
- Versions: before (none: first archived) → after incident\_version:252/w1rmvb8jgk53@4e893cf8df54
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Flags permission issue.
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-05-20 09:42 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-05-20 11:30 UTC
```

**6. Added: Affected components**

```diff
+ Application UI, Feature Experimentation - Application UI, Feature Experimentation - Optimizely REST API, Optimizely REST API
```

**7. Added: Update** (investigating) · 2026-05-20 09:42 UTC

```diff
+ We are currently investigating the issue.
```

**8. Added: Update** (investigating) · 2026-05-20 10:01 UTC

```diff
+ We are continuing to investigate this issue.
```

**9. Added: Update** (monitoring) · 2026-05-20 10:10 UTC

```diff
+ A fix has been implemented and we are monitoring the results.
```

**10. Added: Update** (resolved) · 2026-05-20 11:30 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-05-20 09:42 UTC | Critical incident: Flags permission issue. (this change) | outage |

All Optimizely changes: [timeline](https://rewindex.com/company/optimizely/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/ic4f69a15bcc144 · Markdown: https://rewindex.com/change/ic4f69a15bcc144.md · JSON: https://rewindex.com/api/v1/changes/ic4f69a15bcc144 · Generated 2026-10-18T01:30:01.068Z