Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana (CVE-2026-78581) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-78581

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

Answer in brief

CVE-2026-78581 records a Unknown severity vulnerability in Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana. The current sources do not mark it as known exploited. The current feed maps Elastic/Kibana (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 Aug 25, 2026Updated Aug 25, 2026Source checked Aug 25, 2026First seen by HOL Aug 25, 2026Material review Aug 25, 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/Kibana (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Elastic/Kibanageneric	8.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Elastic/Kibana.
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
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 25, 2026

Sources and claim methodology

Source referencediscuss.elastic.co

Upstream source description

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier to access or modify a conversation they do not own. Successful exploitation requires knowledge of a hard-to-guess identifier.

Quoted source text, attributed separately from HOL analysis.