CVEvulnerability

CVE-2026-72678

6.5 MEDIUM Published 2026-08-13 Modified 2026-09-01 Official page ↗
Status
Analyzed
Published
2026-08-13
Last modified
2026-09-01
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-789

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.

Affected configurations

• elastic elasticsearch (>= 8.19.0 < 8.19.20) • elastic elasticsearch (>= 9.4.0 < 9.4.5) • elastic elasticsearch (>= 9.5.0 < 9.5.1)

Related

Weakness · CWE (1)

  • CWE-789 Memory Allocation with Excessive Size Value weakness

References