# CVE-2026-81941: Command injection in Langflow OSS

> Authenticated users can execute arbitrary OS commands via MCP Tools, bypassing security controls to achieve code execution and privilege escalation.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 12 Sep 2026
- **Also known as:** GHSA-m5q4-pf3r-r78g

## What is CVE-2026-81941?

CVE-2026-81941 is a high-severity command injection vulnerability in Langflow Langflow, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM Langflow OSS 1.0.0 through 1.11.5 allows an authenticated non-administrative user could execute arbitrary operating system commands on the server at the privilege level of the application process by constructing a flow with an MCP Tools component configured to use a local stdio subprocess transport. This bypasses both the LANGFLOW_CUSTOM_COMPONENT_ADMIN_ONLY and LANGFLOW_BLOCK_CODE_INTERPRETER_COMPONENTS server-side controls intended to prevent exactly this class of access. Successful exploitation could lead to arbitrary command execution, sensitive data exposure (including credentials from the process environment), file system modification, and lateral movement to services reachable from the server.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-81941?

It affects 1 product.


Products: Langflow Langflow.

## How do I fix CVE-2026-81941?

No fix has been published for CVE-2026-81941 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-81941 being exploited?

There is no known exploitation of CVE-2026-81941 in the wild and no public exploit code.

## Other vulnerabilities in Langflow Langflow

- [CVE-2026-9198](https://insights.sbomify.com/CVE-2026-9198/): IBM Langflow Code Injection (critical 9.8, exploited in the wild)
- [CVE-2026-0770](https://insights.sbomify.com/CVE-2026-0770/): Langflow Inclusion of Functionality from Untrusted Control Sphere (critical 9.8, exploited in the wild)
- [CVE-2025-3248](https://insights.sbomify.com/CVE-2025-3248/): Langflow Missing Authentication (critical 9.8, exploited in the wild)
- [CVE-2025-34291](https://insights.sbomify.com/CVE-2025-34291/): Langflow Origin Validation Error (critical 9.4, exploited in the wild)
- [CVE-2026-33017](https://insights.sbomify.com/CVE-2026-33017/): Langflow Code Injection (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-81941 and fix it if it is affected.

What it is: CVE-2026-81941 is a high-severity command injection vulnerability in Langflow Langflow, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-81941 in the wild and no public exploit code.

Affected product: Langflow Langflow. 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-2026-81941/ (Markdown: https://insights.sbomify.com/CVE-2026-81941/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-81941
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-81941
- OSV: https://osv.dev/vulnerability/CVE-2026-81941

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-81941/
Summaries are generated and may contain mistakes; the official description above is the record.