TI-2026-50887 Aliases CVE-2026-72649 GHSA-5fhg-p2p3-wmjf

Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution

MEDIUM 42CWE-502Published 2026-09-01 · Updated 2026-09-02

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Deserialization of Untrusted Data (CWE-502) in the Elasticsearch machine learning component can lead to remote code execution via Object Injection (CAPEC-586). A specially crafted trained model artifact could cause attacker-controlled logic to execute with a materially broader system-call surface than intended. Exploitation requires an authenticated user with sufficient privileges to create and deploy trained models.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00918 60th 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	8.0.0 – 8.19.19; 9.0.0 – 9.4.4; 9.5.0	—	No fix listed	CNA

Elasticsearch VendorElastic Affected 8.0.0 – 8.19.19; 9.0.0 – 9.4.4; 9.5.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:elasticsearch::::::::	8.0.0 to before 8.19.20; 9.0.0 to before 9.4.5	Vulnerable	Elastic
cpe:2.3:a:elastic:elasticsearch:9.5.0:::::::*	9.5.0	Vulnerable	Elastic

cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.19.20; 9.0.0 to before 9.4.5 Vulnerable ·Elastic
cpe:2.3:a:elastic:elasticsearch:9.5.0:*:*:*:*:*:*:* Versions 9.5.0 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-72649
2026-10-03 Alias added: GHSA-5fhg-p2p3-wmjf

References

Advisory 1

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-114/390087

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