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-2026-72676

CVE-2026-72676CRITICAL

Elastic Fleet Server — Improper Control of Generation of Code in Fleet Server Leading to Code Injection

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  N    9.1   .0055   43.9     —

AFFECTED
  Product       Versions  Fixed
  Fleet Server  8.5.0 –   —

TIMELINE
  Aug 10  Reserved by elastic
  Aug 13  Published (CNA: elastic)
  Sep 4   RESCORED — CVE-2026-72676 (Elastic Fleet Server). CVSS 6.5 → 9.1 (NVD).

CWE-94 · CNA: elastic · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.

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 4, 2026	RESCORED	RESCORED — CVE-2026-72676 (Elastic Fleet Server). CVSS 6.5 → 9.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Elastic	Fleet Server	—	8.5.0	—

Weaknesses

CWE-94

References (1)

https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-93/389510 [Vendor Advisory]

Authoritative record: CVE-2026-72676 at cve.org

Vendors: elastic

Weaknesses: CWE-94

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-72676 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.