# Cerebras: Identified - Caused by External Depencency

- Impact (vendor’s label): critical
- Status: resolved
- Started: 2025-11-18 12:30 UTC · Resolved: 2025-11-18 15:36 UTC · Duration: 3.1 h
- Updates: 7 · Affected components: ZAI-GLM-4.6, Llama3.1-8B, Developer Console, Qwen-3-235B-Instruct-2507, Qwen-3-32B, GPT-OSS-120B, Llama-3.3-70B
- [Vendor status page: https://stspg.io/v0h6psntlmnw](https://stspg.io/v0h6psntlmnw)
- [Company: Cerebras](https://rewindex.com/company/cerebras.md)

## Part of an outage event

- [Cloudflare outage, Nov 18, 2025: 77 vendors, 81 incidents](https://rewindex.com/events/2025-11-18-cloudflare)
- This incident started in the same window without naming Cloudflare (timing only, not evidence of a link). (timing only, posted +1 h 1 min vs the first vendor naming Cloudflare)

```mermaid
flowchart LR
  root["Cloudflare<br/>own incident not archived"]:::inferred
  h1["Within an hour<br/>13 vendors, 13 blamed Cloudflare<br/>Stytch, Zed, NordLayer +10"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>19 vendors, 19 blamed Cloudflare<br/>GitLab, Gorgias, Cursor +16"]:::blames
  root --> h4
  later["Later<br/>7 vendors, 7 blamed Cloudflare<br/>RudderStack, Brex, Maven Central +4"]:::blames
  root --> later
  me["Cerebras (this incident)<br/>posted +1 h 1 min"]:::me
  root -.->|"same window"| me
```

_Detected automatically from incidents that started together and named the same provider; a link means one incident named another vendor, not a confirmed cause._

## Timeline of updates

- **investigating** 2025-11-18 12:30 UTC: Around 4:09 AM PT, Inference Platform went down causing 500 Internal Server Errors. This issue is caused by a third-party system, and we are currently monitoring.
- **investigating** 2025-11-18 12:54 UTC: We are continuing to investigate this issue.
- **investigating** 2025-11-18 14:24 UTC: We are continuing to investigate this issue.
- **identified** 2025-11-18 14:41 UTC: The issue has been identified and a fix is being implemented.
- **monitoring** 2025-11-18 14:55 UTC: A fix has been implemented and we are monitoring the results.
- **monitoring** 2025-11-18 14:57 UTC: The platform is accessible now. We are monitoring to ensure stability.
- **resolved** 2025-11-18 15:36 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2025-11-18 12:30 UTC: [Critical incident: Identified - Caused by External Depencency](https://rewindex.com/change/i177d73972f4ec6.md)


---
Canonical: https://rewindex.com/company/cerebras/incidents/wmmxw7p006hq · Markdown: https://rewindex.com/company/cerebras/incidents/wmmxw7p006hq.md · JSON: https://rewindex.com/api/v1/companies/cerebras/incidents/wmmxw7p006hq · Generated 2026-10-20T00:07:41.824Z