CVE-2026-78607 Missing Authorization in Elasticsearch Leading to Information Disclosure
Users with inference privileges can expose admin credentials and redirect traffic due to missing authorization checks in Elasticsearch.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-78607?
CVE-2026-78607 is a medium-severity missing authorization vulnerability in Elastic Elasticsearch, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-78607?
1 open source package ship an affected version, including elasticsearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elasticsearch Bitnami | From 8.0.0 | 8.19.19, 9.3.8, 9.4.4, 9.5.1 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-78607?
Upgrade elasticsearch to a fixed version for your release line: 8.19.19, 9.3.8, 9.4.4 or 9.5.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-78607 being exploited?
There is no known exploitation of CVE-2026-78607 in the wild and no public exploit code.
Other vulnerabilities in Elastic Elasticsearch
- CVE-2015-1427 Elasticsearch Groovy Scripting Engine Remote Code Execution
- CVE-2014-3120 Elasticsearch Remote Code Execution
- CVE-2015-5377 Code injection in n/a
- CVE-2026-72649 Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
- CVE-2026-72642 Use of Out-of-range Pointer Offset in the Elasticsearch Machine Learning Native Inference Process
Sources
Also known as AZL-98445, BIT-elasticsearch-2026-78607, CLEANSTART-2026-VN72569, GHSA-876r-2mv4-qm43, MINI-2g73-4rgc-86v7, MINI-2jq7-jm29-fv5p and 19 more.