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.
No analysis available yet.
Remediation
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Tracking
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Advisories
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References
History
Thu, 13 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| 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
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Subscriptions
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Status: PUBLISHED
Assigner: elastic
Published:
Updated: 2026-08-13T20:34:20.569Z
Reserved: 2026-08-10T11:17:58.730Z
Link: CVE-2026-72678
No data.
Status : Received
Published: 2026-08-13T20:17:28.497
Modified: 2026-08-13T20:17:28.497
Link: CVE-2026-72678
No data.
OpenCVE Enrichment
No data.
Weaknesses
-
CWE-789
Memory Allocation with Excessive Size Value