CVE-2026-72680 PUBLISHED

Authorization Bypass Through User-Controlled Key in Kibana Agent Builder Leading to Unauthorized Data Modification

Assigner: elastic
Reserved: 10.08.2026 Published: 13.08.2026 Updated: 13.08.2026

Kibana Agent Builder A2A JSON-RPC API endpoint derives the identifier of a stored conversation from a user-supplied input, and the ownership check on that identifier does not distinguish between a conversation that does not exist and one that exists but belongs to another user. As a result, an authenticated user holding only the Agent Builder read privilege can supply an identifier already in use by another user in the same space and cause that user's conversation to be replaced and reassigned to the requesting account. The original owner permanently loses access to the conversation and its history. The impact is limited to loss of integrity and availability of the affected conversation; the attacker does not read the overwritten content.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 6.5

Product Status

Vendor Elastic
Product Kibana
Versions Default: unaffected
  • affected from 9.2.0 to 9.4.4 (incl.)

References

Problem Types

  • CWE-639 Authorization Bypass Through User-Controlled Key CWE