CVEvulnerability

CVE-2026-72687

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

A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a forged opaque identifier. Elasticsearch decodes and deserializes the identifier before confirming that it was legitimately issued by the cluster, and a size value carried inside the identifier drives an allocation that is neither capped nor accounted for by the available memory-usage controls. The resulting out-of-memory condition is fatal and terminates the affected node process, resulting in a denial of service.

Affected configurations

• elastic elasticsearch (>= 8.0.0 < 8.19.20) • elastic elasticsearch (>= 9.0.0 < 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