Medium [CVE-2026-72647] Denial of Service via uncontrolled recursion in search requests
This medium-severity Red Hat Linux advisory covers CVE-2026-72647 affecting Red Hat OpenShift AI (RHOAI).
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Summary
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230).
An authenticated user holding only read privileges on a single index can submit one specially crafted search request whose deeply nested structure is processed without a depth limit, exhausting the thread stack and terminating the affected node. A flaw was found in Elasticsearch.
This request, containing deeply nested serialized data, is processed without a depth limit, leading to uncontrolled recursion. This flaw has a Moderate impact.
A remote, authenticated attacker with read-level index access can send a specially crafted search request that exhausts the thread stack and terminates the affected Elasticsearch node, resulting in denial of service. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-606. Affected Red Hat products: Red Hat OpenShift AI (RHOAI).
Red Hat lists Red Hat Quay 3 as not affected. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
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