Major incident

Kameleoon: Disruption in Core Engine Services for Web Experimentation (kameleoon.js)

Affected: Campaign Runtime

Current status of Kameleoon: Operational — live Kameleoon status

Timeline

1. Jul 27, 2026, 11:10 UTC
   identified
   We are currently investigating an issue that impacts our core engine application (kameleoon.js), leading to a partial outage. Not all clients are affected. This issue may result in the following impacts: - Experiments and personalizations targeting may not function as expected. - Experiments may display incorrectly. - Event data collection may be inaccurate or incomplete. We apologize for any inconvenience caused and are working diligently to resolve this issue.
2. Jul 27, 2026, 11:29 UTC
   monitoring
   A fix has been implemented and we are monitoring the results.
3. Jul 27, 2026, 13:33 UTC
   resolved
   This incident has been resolved.

Updates as published by Kameleoon (original).