---
id: "CVE-2026-104310"
kind: "vulnerability"
aliases: ["CVE-2026-104310"]
title: "Langflow: authenticated SSRF lets a user read internal server information"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: [{"name": "langflow", "fixed": ["1.12.4"], "affected": ">= 1.0.0, <= 1.12.3", "ecosystem": "pypi"}]
ecosystems: []
tags: ["ai-tooling", "langflow", "python", "self-hosted"]
not_affected_if: ["auth-required", "managed-hosting"]
published_at: "2026-10-29T16:17:43+00:00"
first_seen_at: "2026-10-29T16:25:54+00:00"
updated_at: "2026-10-29T16:32:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104310", "first_seen_at": "2026-10-29T16:25:54+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-29T16:32:37+00:00"}]
---

# Langflow: authenticated SSRF lets a user read internal server information

IBM Langflow OSS versions 1.0.0 through 1.12.3 have a server-side request forgery flaw. A logged-in user can make the server send requests to addresses they choose, which can expose sensitive information.

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

## Affected

- pypi:langflow affected >= 1.0.0, <= 1.12.3 fixed 1.12.4

## How to check

Run pip show langflow or langflow --version. Versions 1.0.0 through 1.12.3 are affected; 1.12.4 or later is fixed.

## Fix

Upgrade Langflow OSS to 1.12.4 or later (IBM bulletin names 1.12.4; no workaround listed).

## Timeline

- 2026-10-29T16:25:54+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104310
- 2026-10-29T16:32:37+00:00 analyst — IBM bulletin (19 Oct 2026) lists this CVE; affected Langflow OSS 1.0.0-1.12.3, fix 1.12.4, no workarounds. Bulletin gives no component detail. A later IBM bulletin names 1.12.5 for other CVEs.

## Documents

- [advisory] IBM Security Bulletin: Langflow OSS is affected by multiple vulnerabilities (19 Oct 2026) https://www.ibm.com/support/pages/security-bulletin-langflow-oss-affected-multiple-vulnerabilities-0

## From the sources

IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery (SSRF) vulnerability.

---

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