# CVE-2026-10561: Unauthenticated Remote Code Execution in Langflow OSS PythonREPLComponent via Builtins Injection

> Unauthenticated attackers can execute arbitrary code on IBM Langflow OSS via builtins injection in the PythonREPLComponent, leading to full system compromise.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Jun 2026
- **Updated:** 23 Jun 2026
- **Also known as:** GHSA-8qpj-27x8-pwpq, PYSEC-2026-4231

## What is CVE-2026-10561?

CVE-2026-10561 is a critical code injection vulnerability in Langflow Langflow, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-10561?

3 open source packages ship an affected version, including langflow. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `langflow` | PyPI | All versions | 1.10.1 |
| `langflow` | PyPI | All versions | 1.10.1 |
| `langflow` | PyPI | All versions | 1.10.1 |

Products: Langflow Langflow.

## How do I fix CVE-2026-10561?

Upgrade langflow to 1.10.1 or later.

## Is CVE-2026-10561 being exploited?

There is no known exploitation of CVE-2026-10561 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-2026-10561 and fix it if it is affected.

What it is: CVE-2026-10561 is a critical code injection vulnerability in Langflow Langflow, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-10561 in the wild and no public exploit code.

Affected packages and fixed versions:
- langflow (PyPI): affected all versions; fixed in 1.10.1
- langflow (PyPI): affected all versions; fixed in 1.10.1
- langflow (PyPI): affected all versions; fixed in 1.10.1

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-2026-10561/ (Markdown: https://insights.sbomify.com/CVE-2026-10561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10561
- OSV: https://osv.dev/vulnerability/CVE-2026-10561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10561/
Summaries are generated and may contain mistakes; the official description above is the record.