CVE-2021-22143: Elastic APM .net Agent

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

The Elastic APM .NET Agent can leak sensitive HTTP header information when logging the details during an application error. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application error it is possible the headers will not be sanitized before being sent.

Affected products

• Elastic APM .net Agent: before 1.10.0 (fixed in 1.10.0)

Published 2023-11-22. Last modified 2026-06-17.