Langflow: auth bypass & code execution

Langflow

Two critical flaws in Langflow allow unauthenticated attackers to bypass authentication or run arbitrary code on servers.

Do this now

Check the Langflow vendor advisory for a fix, and restrict access to Langflow servers to trusted networks meanwhile.

First seen: 2 Nov 2026
Last update: 2 Nov 2026, 14:17 UTC
Source: news
On the menu as: LLM gateways

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

## Langflow: auth bypass & code execution
Severity: unknown. Patch status: fix status unknown.
Affected: Langflow

Two critical flaws in Langflow allow unauthenticated attackers to bypass authentication or run arbitrary code on servers.

## 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.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## 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 for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://thehackernews.com/2026/11/critical-langflow-flaws-could-let.html
https://pwned.coffee/i/langflow-auth-bypass-code-execution

Timeline

2 Nov 2026, 14:17 UTC
Fix status: patched → unknown.
2 Nov 2026
First reported.

Receipt

Exploitation: No known exploitation
Score: No CVSS published yet: severity unknown.
Last checked: 4 Nov 2026, 08:18 UTC

Sources: KEV – CVE record – Vendor –

Sources

feeds.feedburner.com: Critical Langflow Flaws Could Let Unauthenticated Attackers Run Code on Servers

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