6.5
Medium
CVE-2026-72687 A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a…
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Elasticsearch | 9.5.0 | No fix stated |
| Elasticsearch 9.0 | 9.0.0 → 9.4.4 | No fix stated |
| Elasticsearch 8.0 | 8.0.0 → 8.19.19 | No fix stated |
Other CVEs of Elasticsearch
The 91 CVEs of Elasticsearch →
CVE-2026-115715
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to denial of service via a…
6.5
Medium
CVE-2026-115710
Use of Cache Containing Sensitive Information (CWE-524) in Elasticsearch can lead to information disclosure and…
4.2
Medium
CVE-2026-115298
Incorrect Authorization (CWE-863) in Elasticsearch can lead to information disclosure via Accessing Functionality Not…
4.3
Medium
CVE-2026-115290
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads…
7.5
High