Langflow: PythonREPLComponent executes unsandboxed Python code, enabling authenticated RCE and privilege escalation

langflow (pip)

### Summary Langflow's built-in Python interpreter components — `PythonREPLComponent` (Python Interpreter) and the legacy `PythonREPLToolComponent` (Python REPL Tool) — executed arbitrary user- or model-supplied Python code inside flows without effective sandboxing. Because the code ran in-process with the privileges of the Langflow service, any…

First seen: 6 Oct 2026
Last update: 6 Oct 2026, 13:38 UTC
Fixed in: langflow 1.10.1
Identifiers: CVE-2026-10561
CVSS: 10.0
Source: GitHub advisory
On the menu as: PyPI packages
LLM gateways
Python

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Langflow: PythonREPLComponent executes unsandboxed Python code, enabling authenticated RCE and privilege escalation
Severity: critical. Patch status: patched.
Affected: langflow (pip)
Fixed in: langflow 1.10.1
Ids: CVE-2026-10561

### Summary Langflow's built-in Python interpreter components — `PythonREPLComponent` (Python Interpreter) and the legacy `PythonREPLToolComponent` (Python REPL Tool) — executed arbitrary user- or model-supplied Python code inside flows without effective sandboxing. Because the code ran in-process with the privileges of the Langflow service, any…

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `langflow`. For each hit, compare the installed version with the fix on the same major line: langflow 1.10.1. If it's lower, give the exact upgrade command for the package manager this repo uses.
2. This incident involves a provider (ai-gateways). Search config, CI and env templates (.env.example, wrangler.toml, vercel.json, terraform, workflow secrets) for credentials stored there. List each secret by name, where it is used, and how to rotate it. Never print secret values.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-10561") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/advisories/GHSA-8qpj-27x8-pwpq https://github.com/langflow-ai/langflow/commit/2754c84aad1306f463db1c3bbb3e8ffbe85da77d https://github.com/langflow-ai/langflow/pull/13700 https://github.com/langflow-ai/langflow/security/advisories/GHSA-8qpj-27x8-pwpq https://nvd.nist.gov/vuln/detail/CVE-2026-10561
https://pwned.coffee/i/langflow-pythonreplcomponent-executes-unsandboxed-python-cve-2026-10561

Sources

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