---
id: CVE-2026-77819
title: Langflow OSS is affected by multiple vulnerabilities
summary: >-
  IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated
  attacker to overwrite arbitrary files due to improper limitation of a pathname
  to a restricted directory.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: IBM
product: Langflow OSS
affected:
  - langflow_oss >= 1.0.0 <= 1.12.3
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T15:18:52.708Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-77819'
references:
  - url: 'https://www.ibm.com/support/pages/node/7293015'
tags:
  - cve.org
epss: 0.00366
epssPercentile: 0.30499
ingestedAt: '2026-11-01T20:00:16.963Z'
---

## Overview

IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated attacker to overwrite arbitrary files due to improper limitation of a pathname to a restricted directory.

## Affected

- `langflow_oss >= 1.0.0 <= 1.12.3`

## Remediation

IBM strongly recommends addressing the vulnerability now by upgrading  Langflow OSS to version 1.12.4. https://pypi.org/project/langflow/1.12.4/ 



For Langflow OSS versions 1.0.0 - 1.12.3, follow the  Prepare to upgrade instructions and release-specific configuration changes https://docs.langflow.org/release-notes , including backing up your existing installation, then follow the  Langflow OSS installation instructions https://docs.langflow.org/get-started-installation  to install version 1.12.4 and test your flows.