CVE-2026-72639 Affecting elasticsearch-9.5 package, versions <9.5.1-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-ELASTICSEARCH95-19010039
- published20 Aug 2026
- disclosed13 Aug 2026
Introduced: 13 Aug 2026
NewCVE-2026-72639 (opens in a new tab)How to fix?
Upgrade Minimos:latest elasticsearch-9.5 to version 9.5.1-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream elasticsearch-9.5 package and not the elasticsearch-9.5 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure. The allocation occurs before the existing highlighting safety limits are evaluated, so memory exhaustion raises a fatal error that terminates the Elasticsearch node process. This results in a denial of service for the affected node and degrades cluster routing and health. The defect is not volumetric and does not depend on the size of the indexed data, so a single request is sufficient.