All vulnerabilities
CVE-2026-102409

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Elastic ElasticsearchDatabases
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.31%Chance of exploitation activity in the next 30 days, higher than 22% 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

Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated user with low privileges to terminate an Elasticsearch node, resulting in denial of service, via Excessive Allocation (CAPEC-130).

Text from CVE List

Affected versions 4

  • Elasticsearchaffected: 9.2.0 through 9.2.8CVE List
  • Elasticsearchaffected: 9.3.0 through 9.3.8CVE List
  • Elasticsearchaffected: 9.4.0 through 9.4.7CVE List
  • Elasticsearchaffected: 9.5.0 through 9.5.4CVE List

References 1