---
id: "CVE-2026-97677"
page: "https://infrastack.ai/live/CVE-2026-97677"
kind: "vulnerability"
aliases: ["CVE-2026-97677"]
title: "Langflow: authenticated flow authors can write and read arbitrary server files"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: [{"name": "Langflow OSS", "fixed": ["1.12.3"], "affected": ">= 1.0.0, <= 1.12.2", "ecosystem": "pypi"}]
ecosystems: []
tags: ["ai-tooling", "langflow", "python", "self-hosted"]
not_affected_if: ["managed-hosting", "single-trusted-author"]
published_at: "2026-11-08T19:17:54+00:00"
first_seen_at: "2026-11-08T19:22:35+00:00"
updated_at: "2026-11-08T19:23:40+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97677", "first_seen_at": "2026-11-08T19:22:35+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/node/7290694", "first_seen_at": "2026-11-08T19:23:40+00:00", "cites": ["https://www.ibm.com/support/pages/node/7290694"]}]
exploit_sources: []
---

# Langflow: authenticated flow authors can write and read arbitrary server files

Link for people: https://infrastack.ai/live/CVE-2026-97677 (this .md is for agents)

Langflow is an open-source framework for building AI agent and LLM workflows. An authenticated user who can author flows can write attacker-chosen content into any directory the service account can write to, and read arbitrary files the service process can access, including configuration files, secrets and database files.

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

## Affected

- pypi:Langflow OSS affected >= 1.0.0, <= 1.12.2 fixed 1.12.3

## How to check

Run 'pip show langflow' or 'langflow --version' (or check the container image tag). Versions 1.0.0 through 1.12.2 are affected; 1.12.3 is fixed. Then check whether untrusted or less-trusted users can create or edit flows; if so, treat the instance as exposed.

## Fix

Upgrade Langflow OSS to 1.12.3 or later (IBM bulletin, 2 Oct 2026). IBM lists no workarounds or mitigations.

## Timeline

- 2026-11-08T19:22:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-97677
- 2026-11-08T19:23:40+00:00 analyst https://www.ibm.com/support/pages/node/7290694 — IBM bulletin 7290694 (2 Oct 2026) lists CVE-2026-97677 (CWE-22, CVSS 8.1): affected 1.0.0-1.12.2, fix 1.12.3, workarounds none. No exploitation or PoC found in sources (press rewrites only). Social search skipped. Bundle of ~25 Langflow CVEs.

## Documents

- [advisory] IBM Security Bulletin: Langflow OSS is affected by multiple vulnerabilities (2 Oct 2026, fix 1.12.3) https://www.ibm.com/support/pages/node/7290694

## From the sources

IBM Langflow OSS 1.0.0 through 1.12.2 An authenticated flow author could write attacker-controlled file content into any directory writable by the service account, bypassing the platform's local file access isolation safeguard. Via a crafted on-disk index, the attacker could also read the contents of arbitrary files accessible to the service process — including configuration files, secrets, or database files stored under the application's data directory.

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