Langflow Unauth RCE

langflow (pip), langflow-base (pip)

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

Fix it

langflow pip

pip install --upgrade "langflow>=1.3.0"

langflow-base pip

pip install --upgrade "langflow-base>=0.3.0"

First seen: 17 Jun 2025
Last update: 17 Jun 2025, 20:14 UTC
Fixed in: langflow 1.3.0
langflow-base 0.3.0
Identifiers: CVE-2025-3248
Source: GitHub advisory
On the menu as: PyPI packages
LLM gateways

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

## Langflow Unauth RCE
Severity: critical. Patch status: patched.
Affected: langflow (pip), langflow-base (pip)
Fixed in: langflow 1.3.0, langflow-base 0.3.0
Ids: CVE-2025-3248

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

## Steps
1. 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-2025-3248") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/advisories/GHSA-rvqx-wpfh-mfx7 https://github.com/langflow-ai/langflow/commit/faac4db133de32fcb6d483fa9ff52f40ce42bdc0 https://github.com/langflow-ai/langflow/pull/6911 https://github.com/langflow-ai/langflow/security/advisories/GHSA-rvqx-wpfh-mfx7 https://nvd.nist.gov/vuln/detail/CVE-2025-3248
https://pwned.coffee/i/langflow-unauth-rce-cve-2025-3248

Sources

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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