Langflow Authorization Bypass Through User-Controlled Key Vulnerability

Langflow Langflow

Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. Added to CISA KEV on 2026-07-07 (federal deadline 2026-07-10).

First seen: 7 Jul 2026
Last update: 7 Jul 2026, 12:00 UTC
Identifiers: CVE-2026-55255
Source: CISA KEV
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 Authorization Bypass Through User-Controlled Key Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Langflow Langflow
Ids: CVE-2026-55255

Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. Added to CISA KEV on 2026-07-07 (federal deadline 2026-07-10).

## 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-2026-55255") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2 https://nvd.nist.gov/vuln/detail/CVE-2026-55255
https://pwned.coffee/i/langflow-authorization-bypass-through-user-controlled-ke-cve-2026-55255

Sources

Totalone hot coffee