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-2026-78607

CVE-2026-78607HIGH

Elastic Elasticsearch — Missing Authorization in Elasticsearch Leading to Information Disclosure

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  L  N    7.1   .0033   23.6     —

AFFECTED
  Product        Versions  Fixed
  Elasticsearch  8.0.0 –   —

TIMELINE
  Aug 24  Reserved by elastic
  Sep 1   Published (CNA: elastic)
  Sep 2   RESCORED — CVE-2026-78607 (Elasticsearch). CVSS 5.4 → 7.1 (NVD).

CWE-862 · CNA: elastic · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 24, 2026	Reserved	Reserved by elastic
September 1, 2026	Published	Published (CNA: elastic)
September 2, 2026	RESCORED	RESCORED — CVE-2026-78607 (Elasticsearch). CVSS 5.4 → 7.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Elastic	Elasticsearch	—	8.0.0	—

Weaknesses

CWE-862

References (1)

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-9-5-1-security-update-esa-2026-143/390094 [Vendor Advisory]

Authoritative record: CVE-2026-78607 at cve.org

Vendors: elastic

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-78607 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.