CVE-2026-78607 is a vulnerability in Elasticsearch
Published on September 1, 2026
Missing Authorization in Elasticsearch Leading to Information Disclosure
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.
Vulnerability Analysis
CVE-2026-78607 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-78607 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-78607
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Affected Versions
Elasticsearch:- Version 8.0.0, <= 8.19.18 is affected.
- Version 9.0.0, <= 9.3.7 is affected.
- Version 9.4.0, <= 9.4.3 is affected.
- Version 9.5.0 is affected.