Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution (CVE-2026-72649)
Description
A deserialization vulnerability in the Elasticsearch machine learning component allows remote code execution via object injection. This occurs when a specially crafted trained model artifact is deployed, enabling attacker-controlled logic to execute with elevated system-call capabilities. Exploitation requires an authenticated user with sufficient privileges to create and deploy trained models. The vulnerability affects multiple Elasticsearch versions prior to specific fixed releases. A patch is available to address this issue.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72649 is a deserialization of untrusted data vulnerability (CWE-502) in Elasticsearch's machine learning component. It enables remote code execution through object injection (CAPEC-586) by processing a malicious trained model artifact. The attack surface is broader than intended due to the nature of the deserialization flaw. Exploitation requires an authenticated user with privileges to create and deploy trained models. The vulnerability affects Elasticsearch versions >=8.0.0 <8.19.20, >=9.0.0 <9.4.5, and >=9.5.0 <9.5.1. A patch is available to remediate this issue.
Potential Impact
Successful exploitation allows an authenticated privileged user to execute arbitrary code remotely on the Elasticsearch system, potentially compromising the host environment with elevated system-call capabilities beyond intended limits.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade affected Elasticsearch versions to the fixed releases at or beyond 8.19.20, 9.4.5, and 9.5.1. No additional mitigation steps are indicated beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5fhg-p2p3-wmjf
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-72649"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a98458aacd9273b496add37
Added to database: 09/02/2026, 15:49:30 UTC
Last enriched: 09/07/2026, 18:52:29 UTC
Last updated: 10/17/2026, 06:48:20 UTC
Views: 47
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