CVE-2023-6709Public exploitNetwork attack vector

Remote code execution via unsandboxed card templates

Published Dec 12, 2023 · Updated Oct 8, 2024

Server-side template injection in MLflow before 2.9.2 allows remote attackers to execute code through a crafted recipe card template. The Card.to_html method passes self.template to a standard Jinja2 Environment and renders it with the card context instead of a SandboxedEnvironment. Exploitation requires control of a recipe card template that the target renders; successful expressions execute with the MLflow process's privileges.

CVSS severity8.8
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Server-side template injection in MLflow before 2.9.2 allows remote attackers to execute code through a crafted recipe card template. The Card.to_html method passes self.template to a standard Jinja2 Environment and renders it with the card context instead of a SandboxedEnvironment. Exploitation requires control of a recipe card template that the target renders; successful expressions execute with the MLflow process's privileges.

The record

CVE
CVE-2023-6709
Published
Dec 12, 2023
Updated
Oct 8, 2024
Vendor
MLflow Project
Product
MLflow
Classifications
CWE-1336, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MLflow Project · MLflowversion=unspecified <2.9.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
10.0huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo