Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-72680

CVE-2026-72680MEDIUM

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  N  L  L    5.4   .0028   18.2     —

AFFECTED
  Product  Versions  Fixed
  Kibana   9.2.0 –   —

TIMELINE
  Aug 10  Reserved by elastic
  Aug 13  Published (CNA: elastic)
  Sep 3   RESCORED — CVE-2026-72680 (Elastic Kibana). CVSS 6.5 → 5.4 (NVD).

CWE-639 · CNA: elastic · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 10, 2026	Reserved	Reserved by elastic
August 13, 2026	Published	Published (CNA: elastic)
September 3, 2026	RESCORED	RESCORED — CVE-2026-72680 (Elastic Kibana). CVSS 6.5 → 5.4 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Elastic	Kibana	—	9.2.0	—

Weaknesses

CWE-639

References (1)

https://discuss.elastic.co/t/kibana-9-4-5-security-update-esa-2026-82/389535 [Vendor Advisory, Mitigation]

Authoritative record: CVE-2026-72680 at cve.org

Vendors: elastic

Weaknesses: CWE-639

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-72680 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.