Major incident

Harness: Feature Management & Experimentation (FME) user interface unavailable

Affected: FME

Current status of Harness: Operational — live Harness status

Timeline

1. Aug 24, 2026, 00:57 UTC
   investigating
   We are currently investigating this issue.
2. Aug 24, 2026, 01:01 UTC
   investigating
   We are currently investigating reports that the Feature Management & Experimentation (FME) user interface is failing to load. Customers attempting to access the FME console may encounter errors or unresponsive pages. Feature flag evaluation and SDK traffic are not believed to be affected. A further update will follow shortly.
3. Aug 24, 2026, 01:08 UTC
   monitoring
   A fix has been implemented and we are monitoring the results.
4. Aug 24, 2026, 01:12 UTC
   resolved
   This incident has been resolved.
5. Aug 27, 2026, 23:36 UTC
   postmortem
   ## Summary * Starting at **23:42 UTC** on August 23, 2026, several FME customers reported failures loading the FME UI. * FME UI Artifacts served from the CDN expired due to a retention policy, causing FME UI to fail to load. * Any flag request changes through the API, change delivery, and the data pipeline continued to work with no interruption. ## Root Cause * The FME UI is served from a CDN. The UI artifacts got evicted due to a retention policy, causing the UI to fail to load for all users. ## Impact * The FME UI was unable to load for all users across all production environments. ### What was not impacted? * SDK functionality and runtime flag evaluation * Admin API calls * Customer flag configuration data * No data loss occurred ## Remediation * FME UI got restored in the CDN through a deployment * Recovery confirmed across all production environments before closing the incident. ## Action Items * Improve the asset retention policy so that the currently active version is never subject to eviction.

Updates as published by Harness (original).