# CVE-2026-111237: Ultralytics FastSAM AutoBackend Model Loading autobackend.py session.get_modelmeta.custom_metadata_map eval injection

> Local attackers can execute arbitrary code via injection in the AutoBackend model loading metadata handling of Ultralytics FastSAM.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Oct 2026
- **Updated:** 21 Oct 2026
- **Also known as:** GHSA-gcxq-hrqr-8hc4

## What is CVE-2026-111237?

CVE-2026-111237 is a medium-severity code injection vulnerability in Ultralytics FastSAM, published on 16 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-95 (Improper Neutralization of Directives in Dynamically Evaluated Code), CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-111237?


## How do I fix CVE-2026-111237?

No fix has been published for CVE-2026-111237 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111237 being exploited?

There is no known exploitation of CVE-2026-111237 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111237 and fix it if it is affected.

What it is: CVE-2026-111237 is a medium-severity code injection vulnerability in Ultralytics FastSAM, published on 16 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-111237 in the wild and no public exploit code.

Affected product: Ultralytics FastSAM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-111237/ (Markdown: https://insights.sbomify.com/CVE-2026-111237/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111237
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111237
- OSV: https://osv.dev/vulnerability/CVE-2026-111237

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111237/
Summaries are generated and may contain mistakes; the official description above is the record.