SEPTEMBER 5, 2026
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Case File

CVE-2026-63144

MEDIUM · CVSS 6.5 EPSS 0.24%

Source: NVD + CISA KEV + EPSS · Published 2026-07-21 · Last synced 2026-08-20

CyberRota Analysis

AI-Generated

Elasticsearch is vulnerable to a denial of service due to uncontrolled recursion triggered by specially crafted search requests from low-privileged authenticated users with read-level index access. This flaw can lead to fatal errors that either completely disrupt service in single-node deployments or cause repeated node restarts and degraded performance in multi-node clusters. Organizations using Elasticsearch, particularly those with multi-node setups, should prioritize addressing this vulnerability to maintain service availability and stability.

CVE
CVE-2026-63144
Severity
MEDIUM
CVSS
6.5
EPSS
0.24%

Original NVD Description

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation.

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