CVE-2026-72679 Vulnerability Analysis & Exploit Details

CVE-2026-72679
Vulnerability Scoring

6.5

/10

High Risk

If left unpatched, CVE-2026-72679 could lead to major system disruptions or data loss.

Attack Complexity Details

Attack Complexity: Low
Exploits can be performed without significant complexity or special conditions.
Attack Vector: Network
Vulnerability is exploitable over a network without physical access.
Privileges Required: Low
Some privileges are necessary to exploit the vulnerability.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: None
No user interaction is necessary for exploitation.

CVE-2026-72679 Details

Status: Analyzed

Last updated: 🕒 01 Sep 2026, 15:26 UTC
Originally published on: 🕗 13 Aug 2026, 20:17 UTC

Time between publication and last update: 18 days

CVSS Release: version 3

CVSS3 Source

security@elastic.co

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2026-72679 Vulnerability Summary

CVE-2026-72679: Elasticsearch does not apply its configurable input length restriction to a user-supplied pattern accepted by an intervals query. Compiling a deeply nested pattern drives unbounded recursion that exhausts the thread stack and raises a fatal error, terminating the Elasticsearch node process and causing a denial of service for that node. An authenticated user holding only read-only privileges on a single searchable index can trigger the condition with one small search request.

Assessing the Risk of CVE-2026-72679

Access Complexity Graph

The exploitability of CVE-2026-72679 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-72679

CVE-2026-72679 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-72679, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-72679, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2026-72679 has no significant impact on data confidentiality.
Integrity: None
CVE-2026-72679 poses no threat to data integrity.
Availability: High
CVE-2026-72679 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-72679 References

External References

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-81/389501

CWE Common Weakness Enumeration

CWE-674

CAPEC Common Attack Pattern Enumeration and Classification

Serialized Data with Nested Payloads CAPEC-230 Applications often need to transform data in and out of a data format (e.g., XML and YAML) by using a parser. It may be possible for an adversary to inject data that may have an adverse effect on the parser when it is being processed. Many data format languages allow the definition of macro-like structures that can be used to simplify the creation of complex structures. By nesting these structures, causing the data to be repeatedly substituted, an adversary can cause the parser to consume more resources while processing, causing excessive memory consumption and CPU utilization.
Oversized Serialized Data Payloads CAPEC-231 An adversary injects oversized serialized data payloads into a parser during data processing to produce adverse effects upon the parser such as exhausting system resources and arbitrary code execution.

Vulnerable Configurations

cpe:2.3:a:elastic:elasticsearch:8.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.10:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.10:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.11:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.11:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.12:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.12:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.13:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.13:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.14:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.14:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.15:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.15:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.16:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.16:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.17:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.17:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.18:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.18:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.19:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:8.19.19:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:-:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:-:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.0.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.10:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.1.10:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.2.9:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.5:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.6:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.7:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.3.8:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.4:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elasticsearch:9.4.4:*:*:*:*:*:*:*

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