Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data (CVE-2026-78609) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-78609

Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data

Answer in brief

CVE-2026-78609 records a Unknown severity vulnerability in Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data. The current sources do not mark it as known exploited. The current feed maps Elastic/Eck Operator (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 2, 2026Updated Sep 2, 2026Source checked Sep 2, 2026First seen by HOL Sep 2, 2026Material review Sep 2, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Elastic/Eck Operator (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Elastic/Eck Operatorgeneric	2.6.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Elastic/Eck Operator.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 2, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 2, 2026

Sources and claim methodology

Source referencediscuss.elastic.co

Upstream source description

Incorrect Authorization (CWE-863) in Elastic Cloud on Kubernetes (ECK) can lead to unauthorized modification of data via Metadata Spoofing (CAPEC-690). An actor holding limited Kubernetes permissions confined to a single namespace could cause attacker-controlled certificate material to be included in the Elasticsearch client trust bundle managed by ECK in a separate namespace.

Quoted source text, attributed separately from HOL analysis.