TI-2026-50881 Aliases CVE-2026-72642 GHSA-2rm9-5cpg-f943

Use of Out-of-range Pointer Offset in the Elasticsearch Machine Learning Native Inference Process

MEDIUM 41CWE-823Published 2026-08-13 · Updated 2026-08-14

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The native inference process that Elasticsearch uses to evaluate uploaded machine learning models accepts a model operation that computes a memory address from an offset supplied inside the model, without validating that the offset stays within the bounds of the underlying storage. A user with the privileges required to upload and deploy a trained model can craft a model that reads and writes memory outside the intended allocation. The result is heap corruption that crashes the inference process, and, with sufficient control over the heap layout, could allow arbitrary code execution in the context of that process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00604 49th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Elastic	Elasticsearch	8.19.0 – 8.19.19; 9.4.0 – 9.4.4; 9.5.0	—	No fix listed	CNA

Elasticsearch VendorElastic Affected 8.19.0 – 8.19.19; 9.4.0 – 9.4.4; 9.5.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:elasticsearch::::::::	8.19.0 to before 8.19.20; 9.4.0 to before 9.4.5; 9.5.0 to before 9.5.1	Vulnerable	Elastic

cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* Versions 8.19.0 to before 8.19.20; 9.4.0 to before 9.4.5; 9.5.0 to before 9.5.1 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-72642
2026-10-03 Alias added: GHSA-2rm9-5cpg-f943

References

Advisory 1

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-123/389504

TI-2015-01295 The Groovy scripting engine in Elasticsearch before 1.3.8 and 1.4.x before 1.4.3 allows… KEVCVSS 3.1CRITICAL 9.8
TI-2014-02491 The default configuration in Elasticsearch before 1.2 enables dynamic scripting, which… KEVCVSS 3.1HIGH 8.1
TI-2023-15037 Elasticsearch StackOverflow vulnerability CVSS 3.1HIGH 7.5
TI-2021-05135 Information disclosure in Elasticsearch CVSS 3.1MEDIUM 6.5
TI-2021-05136 All versions of Elastic Cloud Enterprise has the Elasticsearch “anonymous” user enabled… CVSS 3.1HIGH 7.5
TI-2015-04530 Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via… CVSS 3.0CRITICAL 9.8

See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences