CVE-2023-6687: Elastic Agent

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered by Elastic whereby Elastic Agent would log a raw event in its own logs at the WARN or ERROR level if ingesting that event to Elasticsearch failed with any 4xx HTTP status code except 409 or 429. Depending on the nature of the event that Elastic Agent attempted to ingest, this could lead to the insertion of sensitive or private information in the Elastic Agent logs. Elastic has released 8.11.3 and 7.17.16 that prevents this issue by limiting these types of logs to DEBUG level logging, which is disabled by default.

Affected products

• Elastic Elastic Agent: from 7.0.0, before 7.17.16 (fixed in 7.17.16); from 8.0.0, before 8.11.3 (fixed in 8.11.3)

Published 2023-12-12. Last modified 2026-06-17.