VULNERABILITY INTELLIGENCE

CVE-2026-72678

CVSS score6.5 MEDIUM
EPSS probability0.47%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure. An authenticated user holding only read privileges can submit a single small crafted request to a product API endpoint that causes the node to attempt an excessively large allocation. The resulting memory exhaustion raises a fatal error that terminates the Elasticsearch node process, causing a denial of service for the affected node and degrading cluster health. The defect is not volumetric, so a single request is sufficient regardless of the heap size configured on the target node.

Weakness classification

  • security@elastic.co: CWE-789

Primary references