# Sigma Computing: Sigma Service Disruption Due to Cloudflare Incident

- Impact (vendor’s label): none
- Status: resolved
- Started: 2025-12-05 16:07 UTC · Resolved: 2025-12-05 09:00 UTC · Duration: -428 min
- Updates: 1
- [Vendor status page: https://stspg.io/f1qpjl2tb2c0](https://stspg.io/f1qpjl2tb2c0)
- [Company: Sigma Computing](https://rewindex.com/company/sigma-computing.md)

## Part of an outage event

- [Cloudflare outage, Dec 5, 2025: 46 vendors, 46 incidents](https://rewindex.com/events/2025-12-05-cloudflare)
- This incident blames Cloudflare as the cause. (hop 1, posted +7 h 21 min vs the first vendor naming Cloudflare)
- Evidence: “…Sigma Service Disruption Due to Cloudflare Incident At 08:56 UTC Cloudflare's scheduled maintenance to their Web Application Firewalls failed and an incident was declared. At 09:12 UTC a fix was deplo…”

```mermaid
flowchart LR
  root["Cloudflare<br/>own incident not archived"]:::inferred
  h1["Within an hour<br/>18 vendors, 18 blamed Cloudflare<br/>Unbounce, Expo, GitLab +15"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>1 vendor, 1 blamed Cloudflare<br/>Klaviyo"]:::blames
  root --> h4
  later["Later<br/>2 vendors, 2 blamed Cloudflare<br/>Bitrise, Sigma Computing"]:::blames
  root --> later
  me["Sigma Computing (this incident)<br/>posted +7 h 21 min"]:::me
  later --- 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

- **resolved** 2025-12-05 09:00 UTC: At 08:56 UTC Cloudflare's scheduled maintenance to their Web Application Firewalls failed and an incident was declared.  At 09:12 UTC a fix was deployed and traffic was restored. Sigma's service was impacted by this incident, as this did not allow traffic to reach our servers. Our internal monitoring matches the incident timeline and indicated that customers may have experienced failures when using our services during this brief incident.


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Canonical: https://rewindex.com/company/sigma-computing/incidents/b6nwqzw4qkqv · Markdown: https://rewindex.com/company/sigma-computing/incidents/b6nwqzw4qkqv.md · JSON: https://rewindex.com/api/v1/companies/sigma-computing/incidents/b6nwqzw4qkqv · Generated 2026-10-20T00:04:08.901Z