CVE-2026-72684
Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service
Description
A flaw in Elasticsearch allows an authenticated user holding only read privileges to submit a small search request containing a crafted user-supplied input. Processing that input causes a specific internal component to allocate memory without any upper bound, and the allocation occurs outside the scope of the existing memory accounting controls that were intended to constrain it. The resulting out-of-memory condition is fatal and terminates the affected node process, causing a denial of service.
INFO
Published Date :
Aug. 13, 2026, 8:17 p.m.
Last Modified :
Sept. 1, 2026, 3:04 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 271b6943-45a9-4f3a-ab4e-976f3fa05b5a | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Elasticsearch to a patched version.
- Configure memory allocation limits.
- Monitor resource utilization closely.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72684.
| URL | Resource |
|---|---|
| https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-76/389508 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72684 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72684
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72684 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72684 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 01, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.19.20 *cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.4.5 Added Reference Type Elastic: https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-76/389508 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-72684', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-13T20:22:55.927897Z'} -
New CVE Received by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Elastic', 'product': 'Elasticsearch', 'versions': [{'status': 'affected', 'version': '8.0.0', 'versionType': 'semver', 'lessThanOrEqual': '8.19.19'}, {'status': 'affected', 'version': '9.0.0', 'versionType': 'semver', 'lessThanOrEqual': '9.4.4'}], 'defaultStatus': 'unaffected'}] Added Description A flaw in Elasticsearch allows an authenticated user holding only read privileges to submit a small search request containing a crafted user-supplied input. Processing that input causes a specific internal component to allocate memory without any upper bound, and the allocation occurs outside the scope of the existing memory accounting controls that were intended to constrain it. The resulting out-of-memory condition is fatal and terminates the affected node process, causing a denial of service. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-76/389508