Elastic Elasticsearch prior 7.17.29/8.19.18/9.3.7/9.4.3 Modify Data Streams API authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Elastic Elasticsearch. It has been rated as problematic. This affects an unknown function of the component Modify Data Streams API. Performing a manipulation results in authorization. This vulnerability is reported as CVE-2026-102407. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Elastic Elasticsearch. This affects an unknown function of the component Modify Data Streams API. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on integrity, and availability. The summary by CVE is:

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.

The advisory is shared at discuss.elastic.co. This vulnerability is uniquely identified as CVE-2026-102407 since 09/29/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available.

Upgrading to version 7.17.29, 8.19.18, 9.3.7 or 9.4.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-3784). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Open Source Elasticsearch

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (elastic): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Elasticsearch 7.17.29/8.19.18/9.3.7/9.4.3

Timelineinfo

09/29/2026 CVE reserved
10/06/2026 +7 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/08/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: discuss.elastic.co
Status: Confirmed

CVE: CVE-2026-102407 (🔒)
GCVE (CVE): GCVE-0-2026-102407
GCVE (VulDB): GCVE-100-414477
CERT Bund: WID-SEC-2026-3784 - Elasticsearch: Mehrere Schwachstellen

Entryinfo

Created: 10/06/2026 21:55
Updated: 10/08/2026 08:51
Changes: 10/06/2026 21:55 (62), 10/08/2026 08:51 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

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