CVE-2026-72638
Medium
Description
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). An authenticated user holding only low-privileged index creation permissions can submit a single request containing a specially crafted, malformed custom analysis definition that is resolved recursively without a cycle or depth check, exhausting the thread stack and terminating the affected node.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Elasticsearch
PublishedAug 13, 2026
First seenAug 13, 2026
Weakness typeCWE-674CWE-674
How to fix
Update
- elastic elasticsearch8.19.20, 9.4.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic elasticsearch | 8.0.0 ≤ v < 8.19.20, 9.0.0 ≤ v < 9.4.5 | 8.19.20, 9.4.5 |
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