CVE-2026-7711: MindsDB Remote Code Execution Vulnerability

CVE-2026-7711 Overview

CVE-2026-7711 is an unrestricted upload weakness in MindsDB versions up to 26.01. The flaw resides in the exec function of mindsdb/integrations/handlers/byom_handler/proc_wrapper.py, part of the Bring Your Own Model (BYOM) Engine Handler component. Attackers can exploit the issue remotely without authentication or user interaction. Public exploit material is available, and the vendor did not respond to early disclosure attempts. The weakness is categorized under CWE-284: Improper Access Control.

Critical Impact

Remote attackers can upload arbitrary content through the BYOM Engine Handler, leading to code execution within the MindsDB process context.

Affected Products

• MindsDB versions through 26.01
• MindsDB BYOM Engine Handler component
• Deployments exposing the proc_wrapper.pyexec function path

Discovery Timeline

• 2026-05-04 - CVE-2026-7711 published to NVD
• 2026-05-05 - Last updated in NVD database

Technical Details for CVE-2026-7711

Vulnerability Analysis

The vulnerability resides in the BYOM Engine Handler, which lets users register custom machine learning models in MindsDB. The exec function inside mindsdb/integrations/handlers/byom_handler/proc_wrapper.py accepts attacker-controlled input without enforcing access control or validating the uploaded payload. As a result, an unauthenticated remote attacker can submit content that the handler subsequently executes inside the MindsDB runtime.

Because BYOM is designed to load and run user-provided model code, the missing restrictions transform an intended feature into a remote code execution primitive. Public proof-of-concept material describing the BYOM RCE path is available in the GitHub RCE Documentation, and additional context is published in VulDB #360887.

Root Cause

The root cause is improper access control [CWE-284] on the BYOM upload path. The exec wrapper does not authenticate callers, does not constrain the artifact format, and does not sandbox the execution context of the supplied model logic. Any client that can reach the MindsDB network endpoint inherits the privileges of the BYOM process.

Attack Vector

The attack is launched over the network and requires no privileges or user interaction. An attacker sends a crafted request to the BYOM Engine Handler, supplies model content that includes attacker-controlled logic, and triggers the exec path. The handler then evaluates the supplied content, giving the attacker arbitrary execution inside the MindsDB process.

No verified exploit code is reproduced here. Refer to the VulDB #360887 CTI Data and the linked GitHub write-up for the full technical chain.

Detection Methods for CVE-2026-7711

Indicators of Compromise

• Unexpected child processes spawned by the MindsDB Python runtime, especially shells or network utilities launched from proc_wrapper.py.
• Inbound HTTP requests to BYOM model registration or execution endpoints from untrusted source addresses.
• New or modified files inside the BYOM model storage directory that were not deployed by an administrator.

Detection Strategies

• Inspect MindsDB application logs for BYOM model uploads and correlate with the source IP and authentication context of each request.
• Monitor process lineage on hosts running MindsDB and alert on non-ML executables descending from the MindsDB service account.
• Apply network detection rules that flag external connections to the MindsDB API port outside approved administrative ranges.

Monitoring Recommendations

• Capture full command lines and parent-child relationships for the MindsDB service to expose handler-driven execution.
• Centralize MindsDB and reverse-proxy logs in a SIEM and retain BYOM-related events long enough to support post-incident review.
• Track outbound connections from MindsDB hosts and alert on traffic to unfamiliar destinations consistent with reverse shells or staging servers.

How to Mitigate CVE-2026-7711

Immediate Actions Required

• Restrict network access to MindsDB so that only trusted administrative networks can reach the API and BYOM endpoints.
• Disable the BYOM Engine Handler in deployments that do not require user-supplied models.
• Run MindsDB under a least-privilege service account and isolate it inside a container or dedicated host.

Patch Information

No vendor patch or advisory is referenced in the available data, and the vendor did not respond to early disclosure. Operators should track the VulDB #360887 entry and the upstream MindsDB project for an official fix and upgrade once a patched release is published.

Workarounds

• Place MindsDB behind an authenticating reverse proxy that blocks unauthenticated access to BYOM routes.
• Apply egress filtering to prevent the MindsDB host from initiating outbound connections to arbitrary internet destinations.
• Audit existing BYOM models, remove any that were not deployed by authorized engineers, and rotate credentials accessible to the MindsDB process.