CVE-2026-72643
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
Kibana Agent Builder determines ownership of a private agent by comparing a stable user identifier when available, otherwise falling back to username comparison. Usernames are not unique across Elasticsearch authentication realms, so two distinct principals with the same username are treated as the same owner.
Risk Assessment
The risk includes disclosure of configuration and instructions of an agent not owned by the caller, and the ability to alter or remove that agent, potentially compromising system integrity.
Recommendation
Implement unique user identifiers independent of username and update Kibana to a patched version.
Original NVD description (English source)
Kibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.