All vulnerabilities
CVE-2026-102407

Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification

Elastic ElasticsearchDatabases
Open in ThreatlineRecord JSON
CVSS
5.4Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published6 Oct 2026Updated 6 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 4

  • Elasticsearchaffected: 7.17.5 through 7.17.29CVE List
  • Elasticsearchaffected: 8.2.2 through 8.19.18CVE List
  • Elasticsearchaffected: 9.0.0 through 9.3.7CVE List
  • Elasticsearchaffected: 9.4.0 through 9.4.3CVE List

References 1