CVE-2026-102407 Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification
An authenticated user can modify unauthorized data streams in Elasticsearch, potentially injecting data or disrupting search functionality.
- 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-2026-102407?
CVE-2026-102407 is a medium-severity missing authorization vulnerability in Elastic Elasticsearch, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect Authorization (CWE-863) in Elasticsearch can lead to unauthorized data stream modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user with sufficient privileges over a single resource could use the Modify Data Streams API to modify a data stream to which they were not otherwise authorized, potentially injecting data into it or affecting its ability to be searched normally. This issue does not allow an attacker to read the contents of a data stream they do not otherwise have access to.
Weakness: CWE-863
Which versions are affected by CVE-2026-102407?
1 open source package ship an affected version, including elasticsearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elasticsearch Bitnami | From 7.17.5 | 8.19.19, 9.3.8, 9.4.4 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-102407?
Upgrade elasticsearch to a fixed version for your release line: 8.19.19, 9.3.8 or 9.4.4.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-102407 being exploited?
There is no known exploitation of CVE-2026-102407 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-106715, BIT-elasticsearch-2026-102407, GHSA-5jmx-xm76-wvvg, MINI-272v-9qwj-rpcj, MINI-2xm3-6cfq-25f9, MINI-42vg-fp79-rr39 and 20 more.