CVE-2026-72656CWE-789

CVE-2026-72656

Medium · published August 14, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

Memory Allocation with Excessive Size Value (CWE-789) in the ES|QL query processing of Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user able to submit ES|QL queries could send a specially crafted query whose evaluation allocates an unbounded amount of heap memory, exhausting the available heap on the receiving node and causing the node to become unavailable.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.3th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-08-14T00:17Z
Affected products (1)
ProductVersionsFixed in
elastic/elasticsearch≥ 8.11.0, < 8.18.08.18.0
References (1)
https://discuss.elastic.co/t/elasticsearch-8-18-0-9-0-0-security-update-esa-2026-111/389495 · [email protected]
EPSS history
Timeline
  • 13 AUG 19:13Z
    Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
    cvelistv5