---
id: "CVE-2026-111237"
kind: "vulnerability"
aliases: ["CVE-2026-111237"]
title: "Ultralytics FastSAM: model metadata loading lets crafted files run code locally"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "computer-vision", "fastsam", "python", "ultralytics"]
not_affected_if: ["no-untrusted-models"]
published_at: "2026-10-16T03:18:03+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T04:28:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111237", "first_seen_at": "2026-10-23T21:57:12+00:00"}]
---

# Ultralytics FastSAM: model metadata loading lets crafted files run code locally

Ultralytics FastSAM's AutoBackend model loader evaluates values from model metadata (imgsz, names, kpt_shape) as code without neutralizing them. An attacker who can supply a model file that a user loads could run code on that machine.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the project pins Ultralytics FastSAM from the repository at or before commit `b4ed20c2fed75eadc5aa7d8b09fedd137b873b52`, for example with `git log -1` in the checkout.
- unknown for other checks; the sources do not give a command or file to confirm exposure beyond the affected function.

## Fix

- unknown: the sources state the project has not responded and give no fixed version. Avoid loading untrusted model files with FastSAM until a fix is published.

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111237

## From the sources

A weakness has been identified in Ultralytics FastSAM up to b4ed20c2fed75eadc5aa7d8b09fedd137b873b52. This affects the function session.get_modelmeta.custom_metadata_map of the file ultralytics/nn/autobackend.py of the component AutoBackend Model Loading. This manipulation of the argument imgsz/names/kpt_shape causes improper neutralization of directives in dynamically evaluated code. The attack requires local access. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_