CVE-2026-72687
Medium · 6.5CVSS
6.5
EPSS
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Published
Aug 13, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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