CVE-2026-102407 — Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 7.17.5 through 7.17.29; affected 8.2.2 through 8.19.18; affected 9.0.0 through 9.3.7; affected 9.4.0 through 9.4.3

CWE

CWE-863

References

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-188/390861

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.