---
id: "CVE-2026-104312"
kind: "vulnerability"
aliases: ["CVE-2026-104312"]
title: "Langflow: authenticated users can make ZIP archives with path traversal entries"
severity: "low"
cvss: 3.5
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "langflow", "python", "self-hosted"]
not_affected_if: ["managed-hosting", "version-outside-range"]
published_at: "2026-10-29T16:17:43+00:00"
first_seen_at: "2026-10-29T16:25:54+00:00"
updated_at: "2026-10-29T16:32:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104312", "first_seen_at": "2026-10-29T16:25:54+00:00"}]
---

# Langflow: authenticated users can make ZIP archives with path traversal entries

IBM Langflow OSS versions 1.0.0 through 1.12.3 let an authenticated user produce a server-generated ZIP archive whose entry paths escape the extraction directory. If a victim extracts that archive with a tool that does not sanitize paths, files can be written anywhere on the victim's host.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Langflow version, for example with `pip show langflow` or the version shown in the Langflow UI, and see whether it falls in 1.0.0 through 1.12.3.

## Fix

- Move to a Langflow OSS release newer than `1.12.3`; the exact fixed version is unknown from the sources.

## Timeline

- 2026-10-29T16:25:54+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104312

## From the sources

IBM Langflow OSS 1.0.0 through 1.12.3 could allow an authenticated attacker to produce a server-generated ZIP archive containing entry paths that traverse outside the intended extraction directory. Extraction of the archive by a victim using a non-sanitizing tool could result in arbitrary file write on the victim's host.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_