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.
Metrics
Affected Vendors & Products
References
History
Tue, 01 Sep 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* |
Thu, 13 Aug 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Thu, 13 Aug 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Elastic
Elastic elasticsearch |
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| Vendors & Products |
Elastic
Elastic elasticsearch |
Thu, 13 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service | |
| Weaknesses | CWE-789 | |
| References |
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| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: elastic
Published: 2026-08-13T19:11:00.432Z
Updated: 2026-08-13T20:34:33.600Z
Reserved: 2026-08-10T11:17:58.731Z
Link: CVE-2026-72687
Updated: 2026-08-13T20:34:29.477Z
Status : Analyzed
Published: 2026-08-13T20:17:29.460
Modified: 2026-09-01T14:58:27.107
Link: CVE-2026-72687
No data.